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: Forensic Medicine
[{'content': 'NOT impoant in brain death: PGI 07 \nSelect and explain. \nA. EEG, B. ECG, C. Absence of brainstem reflex, D. Body temperature', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. ECG', 'role': 'assistant'}]