Which of the following polymers have vinylic monomer units?

Polyacrylonitrile. The addition polymerization of acrylonitrile presence of a peroxide catalyst leads to the formation of polyacrylonitrile, which is used as a substituted for wool in making commercial fibers as Acrilan.
Polystyrene has the monomer unit styrene. 

Teflon is manufactured by the heating tetrafluoroethylene with a free radical or persulphate catalyzed at high pressures.