[Solved paper]Assistant Director (Plastic) Kerala PSC Previous Question Paper|Deputy Manager Kerala PSC Question paper, 139/2023/OL 386/2021
FINAL ANSWER KEY Assistant Director (Plastic) Kerala PSC Previous Question Paper
Question Paper Code: 139/2023/OL
Category Code: 386/2021
Exam: Assistant Director (Plastic)
Date of Test 07-08-2023
Department Industries and Commerce
Question1:-Which of the following is/are correct about intrinsic viscosity?
(i) It is known as Staudinger index
(ii) It has the reciprocal of concentration as dimension
(iii) It is known as limiting viscosity number
(iv) It is dynamic viscosity
A:-Only (ii) and (iii)
B:-Only (i) and (ii)
C:-Only (i) and (iii)
D:-All of the above
Correct Answer:- Option-D
Question2:-Which of the following is not correct about cationic polymerization?
(i) Molecular weight depends on monomer concentration
(ii) Molecular weight increases as temperature increases
(iii) The process is exothermic
(iv) As dielectric constant of solvent increases molecular weight increases
A:-Only (ii)
B:-Only (iv)
C:-Only (iii)
D:-Only (i) and (iii)
Correct Answer:- Option-A
Question3:-Which of the following is used as a telogen in the polymerization of
bromotrifluoroethylene?
A:-Trifluoroethylene
B:-Bromotrifluoromethane
C:-Tetrafluoroethylene
D:-Carbon tetrachloride
Correct Answer:- Option-B
Question4:-Which of the following is in the correct with respect to their Tg?
A:-
Polymethylmethacrylate>Polybutylacrylate>Polyethylacylate>Polymethacrylate
B:-
Polymethylmethacrylate>Polymethacrylate>Polybutylacrylate>Polyethylacylate
C:-Polymethylmethacrylate>Polymethacrylate>Polyethylacylate
>Polybutylacrylate
D:-Polymethacrylate>Polyethylacylate
>Polybutylacrylate>Polymethylmethacrylate
Correct Answer:- Option-C
Question5:-The unit of K value in Mark-Houwink equation is
A:- /g
B:-g/
C:-°C
D:-None of these
Correct Answer:- Option-A
Question6:-What is the molecular weight of polycaprolactum with degree of
polymerisation 1000?
A:-134500
B:-113000
C:-119000
D:-770000
Correct Answer:- Option-B
Question7:-Which polymerization method is suitable for Polyacrylonitrile?
A:-Anionic polymerization
B:-Coordination polymerization
C:-Cationic polymerization
D:-Free radical polymerization
Correct Answer:- Option-A
Question8:-The functionality of acetylene is
A:-1
B:-2
C:-3
D:-4
Correct Answer:- Option-D
Question9:-Reference material used in NMR is
A:-Tetramethylsilane
B:-Dimethylsilane
C:-Trimethylsilane
D:-Triichloromethylsilane
Correct Answer:- Option-A
Question10:-The polymer which is used in space suit is
A:-Polyphenyleneoxide
B:-Polycarbonate
C:-Torlon
D:-Nomex
Correct Answer:- Option-D
Question11:-Which among the following have the lowest LOI?
A:-PTFE
B:-PEEK
C:-Polyacetal
D:-PVC
Correct Answer:- Option-C
Question12:-An exceptionally tough and transparent material used in heart valve
and pace component is
A:-PE
B:-PC
C:-Polysulphone
D:-PMMA
Correct Answer:- Option-C
Question13:-Which among the following is a best antidegradant against metal
poison?
A:-BHT
B:-DNPD
C:-ODPA
D:-PAN
Correct Answer:- Option-B
Question14:-The polymer which is used for water purification
A:-Polyacrylamide
B:-Polysulphone
C:-Polyethylene oxide
D:-Polyester
Correct Answer:- Option-A
Question15:-Which among the following is not a photo conducting polymer?
A:-Poly N-vinyl carbazole
B:-Polythiophene
C:-Polyvinylpyrene
D:-Poly 2- vinyl carbazole
Correct Answer:- Option-B
Question16:-Which polymerization technique often result low molecular weight
polymer?
A:-Bulk polymerization
B:-Emulsion polymerization
C:-Suspension polymerization
D:-Solution polymerization
Correct Answer:- Option-D
Question17:-Equal number of molecules with M1=1000 and M2=10000 are mixed.
The weight average of the resulting polymer will be
A:-9182 g
B:-8970 g
C:-9899 g
D:-9656 g
Correct Answer:- Option-A
Question18:-Which of the following is correct about GPC
(i) Polymer molecules are separated according to their size
(ii) It is a primary method for the determination of molecular weight
(iii) It is used for the determination of Mn and Mw
(iv) It is used for the determination of MWD
A:-(i), (ii) and (iii)
B:-(i), (iii) and (iv)
C:-(ii), (iii) and (iv)
D:-All of the above
Correct Answer:- Option-B
Question19:-Which of the following bonds posses highest bond energy?
A:-C-C
B:-B-O
C:-SI-O
D:-SI-N
Correct Answer:- Option-B
Question20:-Ionic polymers are used for heterogeneous catalysis because of its
__________ property
A:-Ionic cross-linking
B:-Ion-exchange capability
C:-Hydrophilicity
D:-All of these
Correct Answer:- Option-B
Question21:-Natural rubber is chemically known as
A:-Cis-1,4 polyisoprene
B:-Trans-1,4 polyisoprene
C:-Cis-1,3 polyisoprene
D:-Trans-1,3 polyisoprene
Correct Answer:- Option-A
Question22:-What is the role of ammonia in latex preservation?
A:-Use as a bactericide
B:-Enhances the colloidal stability of latex
C:-Deactivates harmful metal ions
D:-All the above
Correct Answer:- Option-D
Question23:-In the latex concentration methods, which process involve only the
removal of water
A:-Evaporation
B:-Electrodecantation
C:-Creaming
D:-Centrifuging
Correct Answer:- Option-A
Question24:-Which rubber among the following is used in products for which
lightness of colour is important?
A:-Ribbed smoke sheets
B:-pale crepe rubber
C:-Brown and Blanket Crepes
D:-Michelin sheets
Correct Answer:- Option-B
Question25:-The rubber containing 20% to 30% of an aromatic or naphthenic
process oil is called
A:-Peptized Rubber
B:-Deproteinized Natural Rubber
C:-Oil-extended Natural Rubber
D:-Tire Rubber
Correct Answer:- Option-C
Question26:-The principle of the Reclaiming processes is
A:-Vulcanization
B:-Devulcanization
C:-Creaming
D:-None of the these
Correct Answer:- Option-B
Question27:-Choose wrong statement among the following
(i) Elastomers exhibits slow recovery after extension
(ii) Elastomers can be vulcanised
(iii) Elastomeric properties are affected by the Tg
(iii) Mechanical properties of elastomers are due to cross-linked, long-chain,
flexible polymer molecules.
A:-Only (i)
B:-(ii) and (iii)
C:-(iii) and (iv)
D:-(ii) and (iv)
Correct Answer:- Option-A
Question28:-The polymeric materials, which combine the processability of
thermoplastics and the functional performance of vulcanised rubbers are called
A:-Thermoplastics
B:-Elastomer
C:-Thermoplastic elastomer
D:-None of these
Correct Answer:- Option-C
Question29:-Polychloroprene rubber is popularly known as
A:-Polynorbornene
B:-Neoprene
C:-Butyl rubber
D:-Nitrile rubber
Correct Answer:- Option-B
Question30:-Which synthetic rubber is also commonly known as Hypalon
A:-Styrene butadiene rubber
B:-Polychloroprene rubber
C:-Nitrile rubber
D:-Chlorosulphonated polyethylene
Correct Answer:- Option-D
Question31:-Example for flame retardant used in rubber compounding
A:-Antimony compounds
B:-Fluorocarbons
C:-Amines
D:-None of these
Correct Answer:- Option-A
Question32:-Conventional vulcanizing system containing
A:-High sulfure/accelerator ratio
B:-High accelerator/sulfur ratios
C:-Intermediate between (1) and (2)
D:-None of these
Correct Answer:- Option-A
Question33:-The additive used to improve the mixing and processing of the rubber
compound is
A:-Accelerator
B:-Vulcanizing agent
C:-Processing aid
D:-Antioxidant
Correct Answer:- Option-C
Question34:-Monomers of butyl rubber are
A:-Isobutene, isoprene
B:-Isobutadiene, isoprene
C:-Isobutylene, isoprene
D:-Isobutylene, Isobutadiene
Correct Answer:- Option-C
Question35:-Blowing agents are used in the manufacture of
A:-Sponge rubber
B:-Tire tube
C:-Conveyor Belt
D:-None of these
Correct Answer:- Option-A
Question36:-Name the person who discovered vulcanization
A:-Charles Goodyear
B:-Thomas Edison
C:-Alexander Graham Bell
D:-George Washington Carver
Correct Answer:- Option-A
Question37:-EPDM stands for
A:-Ethylene propylene diene monomer
B:-Epoxidized diene monomer
C:-Enzyme protonated diene monomer
D:-Ethylene propylene natural rubber
Correct Answer:- Option-A
Question38:-Select inorganic rubber among the following
A:-Nitrile rubber
B:-Natural rubber
C:-Butyl rubber
D:-Silicon rubber
Correct Answer:- Option-D
Question39:-An example for a coplolymer
A:-Nitrile rubber
B:-Natural rubber
C:-Butyl rubber
D:-Silicon rubber
Correct Answer:-Question Cancelled
Question40:-Tripsometer is used to determine
A:-Abrasion resistance
B:-Cure time
C:-Rebound resilience
D:-Compression set
Correct Answer:- Option-C
Question41:-How much rolling resistance should be reduced to get 1% fuel
efficiency?
A:-2% to 3%
B:-3% to 5%
C:-5% to 7%
D:-7% to 9%
Correct Answer:- Option-C
Question42:-Which method is preferred to make rubber products if less heat and
more pressure is required for curing?
A:-Open curing in autoclaves
B:-Water curing
C:-Hot air curing
D:-All of these
Correct Answer:- Option-B
Question43:-Which material is better if we required a short circuit temperature up
to 250°C in power cables?
A:-Crosslinked polyethylene
B:-Polyvinyl chloride
C:-Flurocarbon rubber
D:-All of these
Correct Answer:- Option-A
Question44:-Which is/are the effective method/methods to control the 'nerve'
during rubber processing?
A:-Use factice
B:-Using high structure furnace black
C:-Increase filler loading
D:-All of these
Correct Answer:- Option-D
Question45:-K-value of PVC material recommended in insulating material using in
low and medium voltage cables
A:-45 to 50
B:-50 to 60
C:-65 to 70
D:-70 to 75
Correct Answer:- Option-C
Question46:-Field used in injection bottle cap is
A:-Aluminium silicate
B:-Silica
C:-Barium sulphate
D:-Clay
Correct Answer:- Option-C
Question47:-Which is the preferred speed ratio of four roll calendar matachin where
both side topping can do?
A:-2:3:3:2
B:-2:3:2:3
C:-3:2:2:3
D:-3:2:3:2
Correct Answer:- Option-A
Question48:-Which is the optimal molar ratio of resorcinol to formaldehyde in nylon
coated fabric used in rubber compound?
A:-1:1 to 1:2
B:-1:2 to 1:3
C:-1.5:1 to 1.5:2
D:-1.5:2 to 1.5:3
Correct Answer:- Option-B
Question49:-Which chemical does reduce the dissociation temperature of DNPT in
MC sheet?
A:-HSR
B:-Vulcafor-F
C:-Stearic acid
D:-DEG
Correct Answer:- Option-C
Question50:-Which rubber is suitable for manufacturing inner liners for hot water
washing hoses using in washing machines?
A:-Natural Rubber
B:-SBR
C:-EPDM
D:-NBR
Correct Answer:- Option-D
Question51:-Which among the following is/are act as heat sensitizing agent in heat
sensitized latex?
A:-Ammonium sulphate
B:-Ammonium per sulphate
C:-DPG
D:-All of these
Correct Answer:- Option-D
Question52:-Which process is/are suitable for manufacturing baby soothers?
A:-Straight dipping
B:-Heat sensitized dipping
C:-Dipping by electrodeposition
D:-All of these
Correct Answer:- Option-B
Question53:-Which is using for improving flame resistance of latex foam?
A:-Zinc oxide
B:-Paraffine hydrocarbons
C:-Titanium dioxide
D:-Hydrated aluminum oxide
Correct Answer:- Option-D
Question54:-Which substance is/are added to improve pressure sensitive adhesion
in latex-based adhesive?
A:-PF resin
B:-CI resine
C:-Rosin derivatives
D:-All of these
Correct Answer:- Option-C
Question55:-Which material is widely used in latex - based paper adhesives?
A:-CI resin
B:-Cooked starch
C:-Rosin derivatives
D:-All of these
Correct Answer:- Option-B
Question56:-Which material is widely used to make curing bags in tyre moulds?
A:-Sulphur cured IIR
B:-Resin cured IIR
C:-Di oxime cured IIR
D:-All of these
Correct Answer:- Option-B
Question57:-In hoses, if braid angle is greater than neutral then hose will have
A:-Increased length and increased diameter
B:-Increased length and decreased diameter
C:-Decreased length and increased diameter
D:-Decreased length and Decreased diameter
Correct Answer:- Option-B
Question58:-Which adhesive is generally used when moulded and vulcanized
rubber piece is directly adhered on the metal parts in rubber to metal bonded
products?
A:-Epoxy adhesive
B:-PU based adhesives
C:-NR latex-based adhesives
D:-Polymide adhesive
Correct Answer:- Option-A
Question59:-Which type of accelerators are generally avoided in rubber to metal
bonded products?
A:-Thiurams
B:-Thiazoles
C:-Sulphenamide
D:-All of these
Correct Answer:- Option-A
Question60:-What is the role of Vulcastab L.S in casted latex products?
A:-Stabilizer
B:-Vulcanizing agent
C:-Wetting agent
D:-Antioxidant
Correct Answer:- Option-C
Question61:-Polypropylene produced commercially using a Ziegler-Natta catalyst is
predominantly
A:-Atactic
B:-Syndiotactic
C:-Isotactic
D:-Crosslinked
Correct Answer:- Option-C
Question62:-The characteristics of condensation polymerization are given below
(i) Only -C-C- linkages present in the polymer structure
(ii) Use of bifunctional of polyfunctional monomers
(iii) Elimination of a small by product molecule
Which of the following is true?
A:-(i), (ii), (iii)
B:-(ii) and (iii)
C:-(i) and (ii)
D:-Only (iii)
Correct Answer:- Option-B
Question63:-As the polymer crystallinity increases, the brittleness of polymer
A:-Increases
B:-Decreases
C:-Depends in length of branching in polymer
D:-Remains constants
Correct Answer:- Option-A
Question64:-Consider the following two transitions from the "solid" to the liquid or
rubbery state shown below on a plot of specific volume (Vs) vs temperature (T)
A:-The transition X is Glass transition temperature (Tg) while transition Y is
crystalline melting point (Tm)
B:-The transition X is crystalline melting point (Tm) while transition Y is Glass
transition temperature (Tg)
C:-X and Y are melting points, but X is the Tm of a semi-crystalline material
and Y is the Tm of an almost perfect crystal
D:-X and Y are Tg (Glass transition temperatures), but X is the Tg of a semicrystalline material and Y is the Tg of an almost perfect crystal
Correct Answer:- Option-A
Question65:-Which of the following polymers would you except to be most suitable
for the production of a rubber car bumper guard?
A:-Atactic polystyrene (Tg ˜100ºC)
B:-A random ethylene/propylene copolymer (50/50 composition) Tg ˜40ºC)
C:-Low density polyethylene
D:-High density polyethylene
Correct Answer:- Option-B
Question66:-Which of the following material is not made by injection molding?
A:-Nuts
B:-Tubes
C:-Cups
D:-Electrical fittings
Correct Answer:- Option-B
Question67:-Which one of the following is a condensation polymer?
A:-Nylon
B:-Polythene
C:-PVC
D:-Teflon
Correct Answer:- Option-A
Question68:-In blow molding, to inflate soft plastic, which medium is used?
A:-Air
B:-Water
C:-Oil
D:-Alcohol
Correct Answer:- Option-A
Question69:-Which of the following types of molecular structure are present in
thermosetting polymers?
A:-Linear polymers
B:-Branched polymers
C:-Cross-linked polymers
D:-Long chain polymers
Correct Answer:- Option-C
Question70:-Which one is the natural polyamide polymer?
A:-Cotton
B:-Silk
C:-Nylon-6
D:-Jute
Correct Answer:- Option-B
Question71:-A continuous and aligned glass fiber-reinforced composite consists of
30 vol% glass fibers having a modulus of elasticity of 69 GPa and 70 vol% polyester
resin that, when hardened, displays a modulus of 3.4 GPa. The modulus of elasticity
of this composite in the longitudinal direction is
A:-23.1 GPa
B:-65.6 GPa
C:-42.76 GPa
D:-72.4 GPa
Correct Answer:- Option-A
Question72:-Dry spinning is a process
A:-Which is used for polymers that can be melted easily
B:-Which involves dissolving polymer in a solvent and the solution is extruded
into a chemical bath
C:-Which involves dissolving the polymer into a solvent that can be
evaporated
D:-Which is used only for network polymers
Correct Answer:- Option-C
Question73:-Which of the following statements about plasticizers is true?
A:-Plasticizers increase the modulus while decreasing the glass transition
temperature
B:-Plasticizers decrease the modulus while increasing the glass transition
temperature
C:-Plasticizers are added to increase the intermolecular forces between the
chains
D:-Plasticizers are high boiling organic esters
Correct Answer:- Option-A
Question74:-For 1 inch schedule 40 PVC pipe and 1 inch schedule 80 PVC pipe
which of the following statement is correct?
A:-Schedule 80 PVC pipe has a larger outside diameter than schedule 40 pipe
B:-Schedule 40 PVC pipe has a larger outside diameter than schedule 80 pipe
C:-Schedule 80 PVC pipe has a smaller inside diameter than schedule 40 pipe
D:-Schedule 40 PVC pipe has a smaller inside diameter than schedule 80 pipe
Correct Answer:- Option-C
Question75:-Select the correct option
A:-PCTFE is a thermoplastic polymer and its repeating unit is
B:-PCTFE is a thermoplastic polymer and its repeating unit is
C:-PCTFE is a thermoplastic polymer and its repeating unit is
D:-PCTFE is a thermoplastic polymer and its repeating unit is
Correct Answer:- Option-A
Question76:-Which of the following statements is true for PVC-O pipes?
A:-PVC-O pipes are obtained by the process of molecular orientation of UPVC
to obtain a layered structure
B:-PVC-O pipes are obtained by turning the layered structure of UPVC into an
amorphous structure
C:-PVC-O pipes are obtained by the addition of modifying agents to PVC
D:-PVC-O pipes are obtained by adding oxygen atoms to PVC
Correct Answer:- Option-A
Question77:-Which of the following will not help in controlling the flow lines in
injection molding?
A:-Increasing the injection speed, pressure and material temperature
B:-Round the corners of the mold where wall thickness increases
C:-Decrease the nozzle diameter to reduce the melt flow rate
D:-Relocation of mold gates to create more distance between them and the
mold coolants
Correct Answer:- Option-C
Question78:-Overhead plastic water tanks are manufactured by ___________ process
A:-Injection molding
B:-Rotomolding
C:-Compression molding
D:-Transfer molding
Correct Answer:- Option-B
Question79:-The formation of polyurethane involves chemical reaction between
A:-a di/poly isocyanate and a diol of polyol
B:-Hexamethylene diamine and methanol
C:-Hexamethylene diamine and adipic acid
D:-Terephthalic acid and ethylene glycol
Correct Answer:- Option-A
Question80:-Which of the following statements is correct?
A:-LDPE has low degrees of branching
B:-HDPE has high degree of short and long chain branching
C:-UHMWPE is made up of extremely long chains of polyethylene, which all
align in the same direction
D:-UHMWPE is made up of short chains of polyethylene, which all align in the
same direction
Correct Answer:- Option-C
Question81:-Which among the following test is carried out as per ASTM D 256
A:-Tensile testing
B:-Izod impact testing
C:-Tear Strength testing
D:-Vicat softening temperature
Correct Answer:- Option-B
Question82:-As per is 532 : 2006 tension set of cycle tube shall not be more than
A:-10%
B:-12%
C:-15%
D:-20%
Correct Answer:- Option-C
Question83:-In tensile testing of a rubber sample using standard dumbbell
specimen, the maximum load observed is 60 N. Find the ultimate tensile strength of
the gague length of specimen = 200mm, thickness of specimen = 2mm and the
wodth of specimen at narrow portion = 633
A:-5N/
B:-0.05 N/
C:-50 kg/
D:-0.15 N/
Correct Answer:- Option-A
Question84:-Expression for cure index (ΔtL) in a cure characteristics study using
money viscometer with a large rotor is
A:-Δ
B:-Δ
C:-Δ
D:-Δ
Correct Answer:- Option-A
Question85:-According to BIS specification minimum mechanical stability time
required for concentrated NR latex is
A:-105
B:-546
C:-475
D:-286
Correct Answer:- Option-C
Question86:-In order to find plasticity retention index samples are aged
A:-For 30 minutes at 140ºC
B:-For 48 hours at 100ºC
C:-For 24 hours at 140ºC
D:-For 42 minute at 100ºC
Correct Answer:- Option-A
Question87:-Capacitance of a capacitor made only with two metallic sheets is
increased from 2 F to 5F when the gap between is filled with a polymer. Find the
dielectric constant of that polymer
A:-10
B:-2.5
C:-0.4
D:-7
Correct Answer:- Option-B
Question88:-Which among the following has highest iodine adsorption number
A:-HAF
B:-SAF
C:-ISAF
D:-GPF
Correct Answer:- Option-B
Question89:-Roll deflection is observed in calendars due to
(i) The force that pulls calenders rolls apart is higher in middle and less at ends
(ii) Rolls tend to bend under its own weight
(iii) Uniformly distributed normal force from the compound
A:- (i) and (ii)
B:-(i) only
C:-(ii) only
D:-(ii) and (iii)
Correct Answer:- Option-B
Question90:-In a three roll calender the ratio of speed of middle roll and bottom roll
is 1:1.5. This calender can be used for
A:-Frictioning
B:-Topping
C:-Spreading
D:-None of the above
Correct Answer:- Option-A
Question91:-Compression ratio that can be used for rigid PVC extruder is
A:-3.9:1
B:-1.2:1
C:-2.5:1
D:-10:1
Correct Answer:- Option-C
Question92:-Which method is used for the production of electric wires
A:-Vented extrusion
B:-Cross head extrusion
C:-Twin screw extrusion
D:-Blown film extrusion
Correct Answer:- Option-B
Question93:-Sink mark defect in transfer molding can be eliminated by
(i) Increasing transfer pressure
(ii) Increasing charge weight
(iii) Reducing mold temperature
A:-(i) only
B:-(i) and (ii)
C:-(ii) only
D:-(i), (ii) and (iii)
Correct Answer:- Option-D
Question94:-Which among the following gate is preferred for making solid block
type injection molded articles
A:-Tab gate
B:-Film gate
C:-Ring gate
D:-Pin gate
Correct Answer:- Option-A
Question95:-Rotors of banbury are
A:-Intemeshing
B:-Non Intemeshing
C:-can be intemeshing or non intemeshing
D:-Like rolls of two roll mill
Correct Answer:- Option-B
Question96:-In compounding of rubber using two roll mill, dispersive mixing can be
improved by
(i) Increasing shear rate
(ii) Reducing gap between rolls
(iii) homogenization
A:-(i) only
B:-(iii) only
C:-(i), (ii) and (iii)
D:-(i) and (ii)
Correct Answer:- Option-D
Question97:-Uniform thickness of extrusion blow molded articles are achieved by
(i) Extruding parison with uniform thickness
(ii) Applying high blowing pressure
(iii) Parison programming
A:-(i) only
B:-(ii) and (iii)
C:-(iii) only
D:-(i), (ii) and (iii)
Correct Answer:- Option-C
Question98:-Forming temperature of polypropylene used for thermoforming is
A:-80-110ºC
B:-140-165ºC
C:-175-210ºC
D:-Any temperature above
Correct Answer:- Option-B
Question99:-Identify the combination of chemicals that can be used for RIM
A:-Hexamethylene diamine and adipic acid
B:-Terpthalic acid and ethylene glycol
C:-Poly(propylene oxide) triol and methylene diphenyl diisocyanate
D:-Ethylene oxide and diphenyl guanidine
Correct Answer:- Option-C
Question100:-Sequence of addition of compounding ingredients in early oil addition
method
(i) Elastomer
(ii) Liquid ingredients
(iii) Dry ingredients
A:-(i), (ii), (iii)
B:-(ii), (i), (iii)
C:-(iii), (ii), (i)
D:-(i), (iii), (ii)
Correct Answer:- Option-D
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