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
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 
Select and explain. 
A. Cocaine poisoning, B. Opium poisoning, C. Organophosphorus poisoning, D. Alcohol poisoning
C: Organophosphorus poisoning
Answer: C: Organophosphorus poisoning 
Explanation: Ans. Organophosphorus poisoning