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
Reinsch test is used in diagnosis of poisoning due to: UP 11; COMEDK 12 
Select and explain. 
A. Arsenic, B. Lead, C. Iron, D. Copper sulphate
A: Arsenic
Answer: A: Arsenic 
Explanation: Ans. Arsenic