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': 'Fluoride content is least: \nSelect and explain. \nA. Methoxyflurane, B. Enflurane, C. Isoflurane, D. Sevoflurane', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Isoflurane Isoflurane has least & methoxyflurane has highest fluride contentQ. Methoxyflurane causes vasopressin resistant high output renal failure.Q.', 'role': 'assistant'}]