This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMT Q Bank, Subject name: Forensic Medicine
[{'content': 'All are true about buonian line except:- \nSelect and explain. \nA. Bluish deposits, B. Deposition of Lead acetate granules, C. Over decayed teeth only, D. Seen in saturnism', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Buonian line (A stippled blue line) :- It is seen in chronic lead poisoning called plumbism or saturnism. It is due to formation of lead sulphide by action of H2S formed by decomposed food in the mouth. It is seen on the gums in 50 to 70% of cases. It appears due to subepithelial deposit of granules at the junction with teeth, only near diy or carious teeth.', 'role': 'assistant'}]