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': "Mees's lines are characteristic of: PGI 09; CMC (Ludhiana) 10,13; NEET 14 \nSelect and explain. \nA. Mercury poisoning, B. Arsenic poisoning, C. Lead poisoning, D. Copper poisoning", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Arsenic poisoning', 'role': 'assistant'}]