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': 'Brain dead patient comes under which category in ASA classification? \nSelect and explain. \nA. ASA I, B. ASA 3, C. ASA 4, D. ASA 6', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is'd'i.e., ASA 6(Ref: Millers anesthesia 8th/e p. 1144)Brain dead patient is ASA grade-6.", 'role': 'assistant'}]