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
[{'content': 'Following poisoning retards putrefaction: NEET 13 \nSelect and explain. \nA. Aluminium phosphide, B. Lead, C. Arsenic, D. Copper', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Arsenic', 'role': 'assistant'}]