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': 'Anesthetic agent causing bradycardia are all EXCEPT: \nSelect and explain. \nA. Halothane, B. Isoflurane, C. Thiopentone, D. Ketamine', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ketamine REF: Miller 6'1' ed p. 345 Though ketamine directly causes cardiodepression but due its sympathetic effect it causes Increased HR Increased BP Increases cardiac output.", 'role': 'assistant'}]