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': 'Chocolate Brown postmoem staining is seen in ? \nSelect and explain. \nA. KCl poisoning, B. Opium poisoning, C. H2S poisoning, D. Cyanide poisoning', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., KCl Poisoning", 'role': 'assistant'}]