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 anesthetic induction agent produces cardiac stability. In other words cardiostable anesthesia is. \nSelect and explain. \nA. Ketamine, B. Propofol, C. Thiopental, D. Etomidate', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D. i.e. Etomidate', 'role': 'assistant'}]