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 onset of action of lidocaine is: \nSelect and explain. \nA. 1-2 minutes, B. 5-10 minutes, C. 3-5 minutes, D. 7-8 minutes', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]