This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Poisoning, Subject name: Forensic Medicine
[{'content': 'Not an Organophosphate \nSelect and explain. \nA. Diazinon, B. Endrin, C. Malathion, D. Parathion', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Endrin is an organochloride with the chemical formula C12H8Cl6O. It was primarily used as an insecticide, as well as a rodenticide and pesticide. Commonly used organophosphates are Parathion Malathion Methyl parathion Chlorpyrifos Diazinon Dichlorvos Phosmet Fenitrothion Tetrachlorvinphos Azamethiphos Azinphos-methyl Ref - Krishnan Vij 5th edition pg 532', 'role': 'assistant'}]