CF₂ = CF₂ is a monomer of

Teflon is an addition polymer of tetrafluoroethylene. It is obtained by heating tetrafluoroethylene with free radical or persulfate catalyst at high pressures. The reaction is as shown below, 2 2 2 2 Catalyst , Heat High pressure CF =CF CF CF Tetrafluoroethene Teflon n n → Hence, 2 2 CF =CF is the monomer of Teflon. Thus, (b) is the correct option.