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': 'Hypertension with tachycardia is due to – \nSelect and explain. \nA. Morphine, B. Thiopentone, C. Ketamine, D. Halothane', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Heart rate, BP, cardiac output and myocardial oxygen consumption all are increased by ketamine.', 'role': 'assistant'}]