This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Drug Abuse, Subject name: Forensic Medicine
[{'content': 'A 24 year old male was brought to emergency depament with complaints of nausea and vomiting, sweating, secretions from the eyes,anxiety,yawning, . What shall be the probable diagnosis ? \nSelect and explain. \nA. Organophosphate toxicity, B. Cannabis toxicity, C. Opioid withdrawal, D. Lead toxicity', 'role': 'user'}, {'content': 'Answer: C \nExplanation: OPIOID WITHDRAWAL =After withdrawal of the drug for > 12 hours and lasts about a week. =Clinical feature Yawning is the most common feature. =Grading MINOR: Dilated pupils, piloerection, yawning, rhinorrhoea, myalgia, cramps, lacrimation, anorexia. MODERATE: Restlessness, insomnia, hypeension, tachycardia, tachypnoea, diaphoresis. MAJOR: Vomiting, diarrhoea, hyperactive bowel sounds, hypotension. =Death is caused by cardiac arrest following an arrhythmia and ventricular fibrillation. = Rx- Methadone (25 to 50 mg )twice daily helps recovery.', 'role': 'assistant'}]