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': 'Red brown colour postmoem staining seen in: \nSelect and explain. \nA. Cyanide, B. Phosphorus, C. Carbon-monoxide, D. Aniline', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Aniline', 'role': 'assistant'}]