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': 'Percentage of COHb that usually causes death: NEET 13 \nSelect and explain. \nA. > 50%, B. > 60%, C. > 70%, D. > 80%', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. > 70%', 'role': 'assistant'}]