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
[{'content': 'Cholinesterase activators are useful for the treatment of which poisoning? \nSelect and explain. \nA. Paraquat, B. Parathion, C. Carbamates, D. Organochlorocompounds', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]