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: Pharmacology
[{'content': 'Which one of the following agents sensitises the myocardium to catechlomines: \nSelect and explain. \nA. Isoflurane, B. Ether, C. Halothane, D. Proplofol', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]