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': 'Maximum does of lidocaine as local anesthesia is \nSelect and explain. \nA. 100 mg, B. 200 mg, C. 300 mg, D. 500 mg', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. 500 mg', 'role': 'assistant'}]