This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET Jan 2020, Subject name: Forensic Medicine
The poison commonly detected in exhumed bodies is: 
Select and explain. 
A. Cadmium, B. Arsenic, C. Lead, D. Mercury
B: Arsenic
Answer: B: Arsenic 
Explanation: The greatest concentration ofarsenicis found inhair and nails. Its deposition in hair may begin in 15 days after administration. Arsenic becomes fixed in thecancellous tissue of bones, chiefly thelong bones, owing to the conversion of their phosphates into arsenates. Its presence can be detected in the bones for prolonged periods. Hence, it is prudent to preserve long bones for chemical analysis in suspected cases of chronic arsenical poisoning when a body is exhumed.