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: Surgery
[{'content': 'Conscious sedation in dentoalveolar surgery is best done by \nSelect and explain. \nA. Sevoflurane, B. Isoflurane, C. Midazolam, D. Morphine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]