This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anaesthesia, Subject name: Anaesthesia
[{'content': 'Intravenous anaesthetics are all except. \nSelect and explain. \nA. Propofol, B. Opioids, C. Ketamine, D. Desflurane', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Intravenous anesthetics are barbiturates - Thiopentone sodium, methohexitone Non-Barbiturates - Propofol, Ketamine, Etomidate, Opioids. Inhalational anesthetics are halothane, isoflurane, desflurane, sevoflurane.', 'role': 'assistant'}]