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': 'The poison that can be detected in hair long after death is - \nSelect and explain. \nA. Lead, B. Mercury, C. Arsenic, D. Cannabis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Arsenic poisoning\xa0can be detected from hair and nails long after death.', 'role': 'assistant'}]