This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Poisoning, Subject name: Forensic Medicine
[{'content': 'Body died in emergency room with white froth in mouth. The poisoning is due to - \nSelect and explain. \nA. Orgnophosphorus, B. Opium, C. HCN, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Autopsy findings in opium poisoning * Signs of asphyxia * white Froth at mouth and nostrils * Smell of opiate may present * Injection marks/skin abscess/scarring in addicts * Emaciation * Pulmonary edema * Cerebral edema REF;THE SYNOPSIS OF FORENSIC MEDICINE:KS NARAYANA REDDY;28th EDITION;PAGE NO 336', 'role': 'assistant'}]