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
Brain dead patient comes under which category in ASA classification? 
Select and explain. 
A. ASA I, B. ASA 3, C. ASA 4, D. ASA 6
D: ASA 6
Answer: D: ASA 6 
Explanation: Ans. is'd'i.e., ASA 6(Ref: Millers anesthesia 8th/e p. 1144)Brain dead patient is ASA grade-6.