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': 'Sufentanyl is a potent – \nSelect and explain. \nA. Myocardial depressant, B. Analgesic, C. Antic onvulsnt, D. Hepatotoxin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Sufentanil is a short acting opioid analgesic, which can be used in anaesthesia.', 'role': 'assistant'}]