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
Decomposition of a body produces green colour due to hydrogen sulphide accumulating. Where does this colour change first occur? 
Select and explain. 
A. Face, B. Iliac fossa, C. Around umbiticus, D. Palms and soles
B: Iliac fossa
Answer: B: Iliac fossa 
Explanation: Right Iliac fossa is the first region to show this discolourization. Because Caecum lies superficially in Right ILiac fossa.