This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Poisoning, Subject name: Forensic Medicine
'Glassblowers shakes' are seen in poisoning due to 
Select and explain. 
A. Lead, B. Copper, C. Mercury, D. Arsenic
C: Mercury
Answer: C: Mercury 
Explanation: Glassblowers shakes' (hatters shake) is a form of chronic mercury poisoning occurring in workers exposed to mercury, characterized by muscle tremors, mental and behavioural changes, and stomatitis. Glassblower's cataracts are a form of cataract. They are formed by many years of exposure to infrared radiation while working. Ref: Krishan Vij textbook of forensic medicine, 5th edition pg : 473