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
First PM change in a dead body:- 
Select and explain. 
A. Maggot formation, B. Putrefaction, C. Greenish discoloration of right iliac fossa, D. Mummification
C: Greenish discoloration of right iliac fossa
Answer: C: Greenish discoloration of right iliac fossa 
Explanation: First postmoem change in dead body is greenish discoloration of right iliac fossa * It's because of presence of caecum * Its first external site of putrefaction (Right Iliac Fossa) | H2S + Hb - sulf. Hb - green. * 1st internal site - Intima of aoic lumen (Reddish brown discoloration) * Most imp. bacteria involved in putrefaction - Clostridium welchi