This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Death and postmortem changes, Subject name: Forensic Medicine
[{'content': 'What is first external sign of decomposition of dead body - \nSelect and explain. \nA. Decomposition of liver and intestine, B. Greenish discoloration over right iliac fossa, C. Greenish discoloration over dependent pas, D. Blood stained froth from mouth', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The first external sign of putrefaction in body is greenish discolouration over right iliac fossa, caecum where the contents are more fluid and full of bacteria. Dr. Narayana Reddys Synopsis of Forensic Medicine & Toxicology 27 th edition pg. 82.', 'role': 'assistant'}]