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': 'First external sign of decomposition in a dead body: NEET 13 \nSelect and explain. \nA. Decomposition of liver and intestine, B. Greenish discoloration over right iliac fossa, C. Greenish discoloration over dependent pas, D. Bloodstained froth from mouth', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Greenish discoloration over right iliac fossa', 'role': 'assistant'}]