Organophosphate insecticides are all except:: (A) Dieldrin, (B) Fenthion, (C) Diazinon, (D) Chlorpyrifos
Answer is A. Organo phosphorous insecticides Malathion Parathion Fenthion Diazion Fenitrothion Chlorpyrifos Dioxathion Chlohion Organo chlorine insecticides DDT BHC (HCH) Lindane Dieldrin Carbamate insecticides Carbaryl Propoxur