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': 'Most common feature of opiate poisoning: NIMHANS 11 \nSelect and explain. \nA. Respiratory depression, B. Hypotension, C. Bradycardia, D. Hypothermia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Respiratory depression', 'role': 'assistant'}]