This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Death and Investigations, Subject name: Forensic Medicine
[{'content': 'Which of the following retards putrefaction? \nSelect and explain. \nA. Mercury, B. Lead, C. Arsenic, D. Copper', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. c (Arsenic). (Ref. Parikh, Textbook of FMT, 5th/701, 752)ARSENIC# Arsenic retards putrefaction.# The body is therefore well preserved in chronic poisoning by ajrr.enic.# Consequently the autopsy findings are clear despite lapse of time.# Because of its preservative properties, arsenic is used for embalming purposes.# In chronic poisoning arsenic has pervaded tissue & therefore retardation of decomposition is evident.# The preservative influence of arsenic upon the tissue of those poisoned by it has been observed even followingexhumation.# Samples of hair & nails should be taken for analysis, as the poison is stored permanently in them.# Chronic antimony poisoning also has a preservative effect on the body like arsenic.', 'role': 'assistant'}]