The correct option is C tetrafluoroethene
Teflon is a polymer of tetrafluoroethene. Teflon is manufactured by heating tetrafluoroethene with a free radical or persulphate catalyst at high pressures. Hence, it is a polymer of tetrafluoroethene.
It is chemically inert and resistant to attack by corrosive reagents.
nCF2=CF2persulphate−−−−−−−−→high pressure[−CF2−CF2−]n