This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Toxicology - 2, Subject name: Forensic Medicine
[{'content': 'One of the following is a stupefying agent \nSelect and explain. \nA. Atropine, B. Aconite, C. Datura, D. Nerium', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Examples of stupefying poisons : Alcohol dhatura cannabis chloral hydrate', 'role': 'assistant'}]