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': 'Burtonian line is seen in which poisoning ? \nSelect and explain. \nA. Thallium, B. Lead, C. Arsenic, D. Mercury', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Burtonian line are bluish lines along the gems seen in lead poisoing. It is seen opposite to\xa0caries tooth. It occurs beacuse of lead sulphite deposition.', 'role': 'assistant'}]