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: Medicine
[{'content': 'Agents recommended in treatment  of aortic dissection are all except \nSelect and explain. \nA. Beta blockers, B. Labetolol, C. Sodium nitoprusside, D. Diazoxide', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Diazoxide is vasodilator ,which can aggravate dissection, so containdicated in aortic dissection.', 'role': 'assistant'}]