This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anaesthesia
[{'content': 'Anaesthetic agent causing analgesia \nSelect and explain. \nA. Ketamine, B. Propofol, C. Etomidate, D. Thiopentone', 'role': 'user'}, {'content': 'Answer: A \nExplanation: "Ketamine is different from most other anaesthetic induction agents inthat it has significant analgesic action"(Refer: stoelting\'s pharmacology and physiology in anaesthetic practice, 5th edition, pg no.294)', 'role': 'assistant'}]