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': 'Which of the following anaesthetic agents have good analgesic property ?a) Ketamineb) Nitrous oxidec) Thiopentoned) Propofole) Midazolam \nSelect and explain. \nA. ab, B. a, C. ad, D. bc', 'role': 'user'}, {'content': 'Answer: A \nExplanation: General anaesthetics with analgesic action → ketamine, trilene (trichloro ethylene), N2O, ether.', 'role': 'assistant'}]