Which of the following structures represents the Neoprene polymer?

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A:$ Dacron is an example of polyester polymer.
Reason $R:$ Dacron is made up of ethylene glycol and terephthalic acid monomers.
In the light of the above statements,choose the most appropriate answer from the options given below.

Identify the monomers in the following polymeric structures:
$(i)$ $-[CO-(CH_2)_8-CO-NH-(CH_2)_6-NH]-_n$
$(ii)$ Melamine-formaldehyde polymer

Ebonite is ........ .

Identify the polymer obtained from the copolymerization of $CH_2=CH-CN$ (acrylonitrile) and $CH_2=CH-CH=CH_2$ ($1$,$3$-butadiene).

Write down the preparation,properties,and uses of Neoprene.