Burtonian line is seen in?
Mercury
Lead
Arsenic
Zinc
Ans. is 'b' i.e., Lead o Burtonian line is blue line, which is seen on upper gums in lead poisoning.o Similar blue line (but not called burtonian line in these cases) is also seen in poisoning with Mercury (Hg), Copper (Cu)y Silver (Ag), bismuth (Bi), andiron (Fe).
Forensic Toxicology - Concepts, Statutes, Evidence, and Techniques