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: Social & Preventive Medicine
Organophosphate insecticides are all except 
Select and explain. 
A. Dieldrin, B. Fenthion, C. Diazinon, D. All
A: Dieldrin
Answer: A: Dieldrin 
Explanation: Ans. is `a' i.e., Dieldrin