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': 'The best monitor of the level of analgesia is: \nSelect and explain. \nA. Verbal response., B. Touch response., C. Optic response., D. All of the above.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Verbal response is the best monitor to check the level of analgesia.', 'role': 'assistant'}]