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: Anaesthesia
[{'content': 'Commonly used in narcoanalysis \nSelect and explain. \nA. Atropine, B. Scopolamine, C. Opium, D. Thiopentone', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Thiopentone', 'role': 'assistant'}]