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 post moem staining is seen in: \nSelect and explain. \nA. Dhatura, B. Aniline, C. CO, D. All', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Aniline', 'role': 'assistant'}]