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: Forensic Medicine
[{'content': 'Opium poisoning is treated with: \nSelect and explain. \nA. Nalorphine, B. Atropine, C. Neostigmine, D. All', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Nalorphine', 'role': 'assistant'}]