This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
[{'content': 'Organophosphates bind to \nSelect and explain. \nA. Anionic site of AChEs, B. Esteratic site of AChEs, C. Ach, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: (Ref: KDT 6/e p99-100) The active region of Acetylcholinesterase (AChE) has two sites i.e. an anionic site and an esteratic site. Anticholinesterase poisoning like Organophosphate compounds binds to esteratic site of AChE.', 'role': 'assistant'}]