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: Pharmacology
[{'content': 'A patient is undergoing abdominal surgery , which of the following drug can safely be stopped before surgery: \nSelect and explain. \nA. Steroids, B. ACE inhibitors., C. Beta-blockers., D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: All antihypertensives should be continued in the preoperative period except ACE inhibitors, Angiotensin receptor blocker, diuretics.', 'role': 'assistant'}]