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
Burtonian line is seen in which poisoning ? 
Select and explain. 
A. Thallium, B. Lead, C. Arsenic, D. Mercury
B: Lead
Answer: B: Lead 
Explanation: Burtonian line are bluish lines along the gems seen in lead poisoing. It is seen opposite to caries tooth. It occurs beacuse of lead sulphite deposition.