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': 'A patient with alcoholic liver failure requires general anaesthesia for surgery. The agent to be used – \nSelect and explain. \nA. Ether, B. Halothane, C. Methoxyflurane, D. Isoflurane', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Isoflurane is the volatile agent of choice in liver disease as it has the least effect on hepatic blood flow.', 'role': 'assistant'}]