Which one of the following is not a condensation polymer?

Explanation:

Neoprene is not a condensation polymer. It is an addition polymer.
Neoprene is made from monomer chloroprene (2-chlorobuta-1,3-diene).

Dacron, Melamine and Glyptal are condensation polymers.

Dacron ( also known as terylene) is a polyester made by condensation polymerisation of ethylene glycol and dimethyl terephthalate.

Glyptal is a copolymer of ethylene glycol and phthalic acid.

Melamine ( or formaldehyde melamine polymer) is obtained from condensation polymerisation of melamine with formaldehyde.

Final Answer:

Correct option is B.