select the chlorofluorocarbons(s) (CFCs) that is/are polarFreon-C318 (C4F8 cycli

select the chlorofluorocarbons(s) (CFCs) that is/are polarFreon-C318 (C4F8 cyclic structure) Freon-111 (C2Cl5F) Freon-122(C2HCl3Fs)