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': 'Deep blue colour of hypostasis is seen in death due to poisoning by : \nSelect and explain. \nA. Potassium cyanide, B. Phosphorus, C. Aniline dyes, D. Carbon monoxide', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Aniline dye', 'role': 'assistant'}]