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: Pharmacology
Organophosphates bind to: 
Select and explain. 
A. Anionic site of AChEs, B. Esteratic site of AChEs, C. ACh, D. None
B: Esteratic site of AChEs
Answer: B: Esteratic site of AChEs 
Explanation: 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 the esteratic site of AChE.