Identify a monomer used in preparation of neoprene.

Neoprene is synthesized through addition polymerization of chloroprene, chemically designated as 2-chloro-1,3-butadiene.

Option analysis:

A) 2-methyl-1,3-butadiene (isoprene): monomer for natural rubber
B) 2-chloro-1,3-butadiene (chloroprene): monomer for neoprene
C) Melamine: monomer for melamine-formaldehyde resin
D) 1,3-butadiene: monomer for Buna-S and Buna-N rubbers

The monomer for neoprene is thus 2-chloro-1,3-butadiene.