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': 'All are used to produce controlled hypotension except \nSelect and explain. \nA. Nitroglycerine, B. Isoflurane, C. Esmolol, D. Propofol', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Isoflurane > sevoflurane > desflurane\xa0are the inhalational agents of choice for controlled hypotension.', 'role': 'assistant'}]