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': 'Green blue postmortem discoloration is seen in which poisoning – \nSelect and explain. \nA. Cyanide, B. Carbon monoxide, C. Hydrogen sulphide, D. Phosphorous', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The colour of postmortem hypostasis in hydrogen sulphide poisoning is bluish green. It is an asphyxiant which inhibits cytochrome oxidase.', 'role': 'assistant'}]