Nylon-6,6 is a condensation polymer of hexamethylene diamine and adipic acid.
Buna-S, Teflon and Neoprene are addition polymer.
So, the correct option is (B): Nylon 6, 6
Neoprene is formed from chloroprene. It is prepared by free radical polymerisation. The monomer of neoprene is chloroprene. It is used for preparing gaskets, conveyor belts etc.