This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pre Anesthetic Evaluation, Subject name: Anaesthesia
[{'content': 'Patient on oral lithium therapy. How many ours prior to surgery we stop lithium- \nSelect and explain. \nA. 24 hrs, B. 48 hrs, C. 72 hrs, D. 96 hrs', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Patient on oral lithium therapy needs to stop taking the medication 24-48 hrs prior to surgery. Lithium may potentiate neuromuscular blocker thus it is stopped prior to surgery.', 'role': 'assistant'}]