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': 'A patient was found in a locked room having labored breathing, kerosene-like smell, pin-point pupils, frothing from mouth, cyanosed and pulse rate of 40/min. Likely diagnosis is: KCET 13 \nSelect and explain. \nA. Cocaine poisoning, B. Opium poisoning, C. Organophosphorus poisoning, D. Alcohol poisoning', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Organophosphorus poisoning', 'role': 'assistant'}]