Natural rubber is the polymer of : A. Isoprene B. Styrene C. Butadiene D. Ethylene

Isoprene
Styrene
Butadiene
Ethylene

The correct answer is A. Isoprene.

Natural rubber is a polymer of isoprene, a five-carbon hydrocarbon. It is produced by the polymerization of isoprene monomers, which are linked together to form long chains. These chains are then twisted and folded into a three-dimensional network, which gives natural rubber its elasticity and strength.

Isoprene is a naturally occurring compound that is found in the sap of many plants. It is also produced synthetically.

Styrene is a six-carbon hydrocarbon that is used to make polystyrene, a type of plastic.

Butadiene is a four-carbon hydrocarbon that is used to make synthetic rubber.

Ethylene is a two-carbon hydrocarbon that is used to make polyethylene, a type of plastic.