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 postmortem staining is seen in – \nSelect and explain. \nA. H S Poisoning, B. Opium Poisoning, C. KCl Poisoning, D. Cyanide poisoning', 'role': 'user'}, {'content': 'Answer: C \nExplanation: In poisoning by nitrites, potassium chlorate, nitrobenzene, potassium bicarbonate and aniline the colour of postmortem hypostasis is chocolate brown due to methemoglobinemia.', 'role': 'assistant'}]