a. Ethylene- propylene copolymer
b. Vulcanised rubber
c. Polypropylene
d. Polybutylene
Ans. a
(8)
5/5 - (1 vote)
a. Ethylene- propylene copolymer
b. Vulcanised rubber
c. Polypropylene
d. Polybutylene
Ans. a
(8)
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