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
[{'content': 'Organophosphate insecticides are all except - \nSelect and explain. \nA. Dieldrin, B. Fenthion, C. Diazinon, D. Propoxur', 'role': 'user'}, {'content': "Answer: A \nExplanation: 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", 'role': 'assistant'}]