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': "Buon's line is seen in: Al 07; Rajasthan 11; NEET 13; JIPMER 13 \nSelect and explain. \nA. Lead poisoning, B. Arsenic poisoning, C. Phosphorus poisoning, D. Zinc poisoning", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Lead poisoning', 'role': 'assistant'}]