A) `"CCl"_4` – Perhalogen compound - Carbon compound replaced by all hydrogen atoms with halogen atoms B) `CHCl_3` - Chloroform can be used an anaesthetic (earlier) C) `CH_3 CHCI_2` - Gemdihalide two halogen atoms on same carbon D) `CICH_3 CH_2 CI –` Vicinal halide two halogen atoms on adjascent carbon atoms