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': 'Agent which dissolves rubber \nSelect and explain. \nA. Halothane, B. Enflurane, C. Cyclopropane, D. Ether', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Halothane', 'role': 'assistant'}]