This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Preoperative assessment and monitoring in anaesthesia, Subject name: Anaesthesia
[{'content': 'Lithium should be Stopped how many days before surgery \nSelect and explain. \nA. 1 days, B. 2 days, C. 3 days, D. 4 days', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Lithium should be stopped around 48-72 hrs before surgery.', 'role': 'assistant'}]