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': 'Marquis test is done for: BHU 08 \nSelect and explain. \nA. Mercury poisoning, B. Arsenic poisoning, C. Morphine poisoning, D. Cyanide poisoning', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Morphine poisoning', 'role': 'assistant'}]