This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, Subject name: Social & Preventive Medicine
Organophosphate insecticides are all except - 
Select and explain. 
A. Dieldrin, B. Fenthion, C. Diazinon, D. Propoxur
A: Dieldrin
Answer: A: Dieldrin 
Explanation: Organochloride compounds: DDT Lindane Methoxychlor HCH Chlordane Dieldrin Aldrin Toxaphene Kepone Mirex Organophosphorous compounds: Chlohion Diazinon Dioxathion Dimethoate EPN Malathion (OMS-1) Fenthion (OMS-2) Methyl parathion Parathion Ronnel Trichlorfon Dichlorvos Abate (OMS-786) Naled Gardona Chlorpyrifos Fenitrothion (OMS-43) Dicapthon (OMS-214 Park's Textbook of Preventive and Social Medicine, 25th Edition, Pg 843