This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
[{'content': "Criteria for Brainstem death includes \nSelect and explain. \nA. Positive Doll's eye Reflex, B. Absent pupillary light reflex and delated pupils, C. Pinpoint pupils, D. Positive vestsibulo-ocular reflex", 'role': 'user'}, {'content': "Answer: B \nExplanation: Harrison's principles of internal medicine 17th edition. *Cardinal signs of death are cessation of cardiac function and respiration,pupils become fixed,body becomes cool,muscles and incontinence may occur", 'role': 'assistant'}]