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
Following poisoning retards putrefaction: NEET 13 
Select and explain. 
A. Aluminium phosphide, B. Lead, C. Arsenic, D. Copper
C: Arsenic
Answer: C: Arsenic 
Explanation: Ans. Arsenic