This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Forensic Medicine
Not an organophosphate: AFMC 12 
Select and explain. 
A. Diazinon, B. Endrin, C. Malathion, D. Parathion
B: Endrin
Answer: B: Endrin 
Explanation: Ans. Endrin