Answer: b. Addition polymerization
Explanation:
Polymerization is a chemical reaction in which small units called as monomers combine together to result into bigger molecules called as polymers.
Condensation polymerization : A chemical reaction in which small units called as monomers are joined to form a bigger molecule called as polymer and small by products are also formed along with the polymer. Example: Nylon-6
Addition polymerization : A chemical reaction in which small units called as monomers are joined end to end to form a bigger molecule called as polymer. Example: Polythene
