Which of the following is a polyamide?

Amongst the following,how many of them come under the category of elastomers?
Natural rubber,polyethene,vulcanized rubber,bakelite,polyvinylchloride,Buna-$N$,Nylon $6$,Neoprene

Write the monomers used for getting the following polymers:
$(i)$ Polyvinyl chloride
$(ii)$ Teflon
$(iii)$ Bakelite

Which of the following is a branched polymer?

Which of the following is not an example of an addition polymer?

Which of the following is not a polymer?