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: Anaesthesia
[{'content': 'Best antagonist of morphine is – \nSelect and explain. \nA. Nalorphine, B. Naloxone, C. Buprenorphine, D. Pentazocine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Naloxone is the preferred specific antidote for morphine poisoning.', 'role': 'assistant'}]