Select all the polymers that are chain-growth (addition) homopolymers.

ATerylene
BPolyacrylonitrile
CPoly(methyl methacrylate)
DTeflon (PTFE)

Answer: B, C, D

Polyacrylonitrile from

CH X_{2} = CH - CN

, PMMA from methyl methacrylate and PTFE from tetrafluoroethene each come from one monomer by addition. Terylene is a condensation polymer from two monomers.

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