This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thanatology, Subject name: Forensic Medicine
Putrefaction sign first appears at 
Select and explain. 
A. Liver undersurface, B. In mediastinum, C. Below the spleen, D. In kidney
A: Liver undersurface
Answer: A: Liver undersurface 
Explanation: First external sign of putrefaction is the greenish discolouration in right iliac fossa. Internally, first site of reddish brown discolouration is aoic intima and then the undersurface of liver