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': 'Antidote of choice for organophosphate and carbamate poisoning is: \nSelect and explain. \nA. Physostigmine., B. Atropine., C. Tacrine., D. Rivastigmine.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Atropine is an antidote of choice for both organophosphate and carbamate poisoning.', 'role': 'assistant'}]