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': 'Buonian line is seen with poisoning of \nSelect and explain. \nA. Mercury, B. Lead, C. Arsenic, D. Zinc', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Lead', 'role': 'assistant'}]