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': 'Hepatitis is caused by: \nSelect and explain. \nA. Cyclopropane, B. Halothane, C. Isoflurane, D. Enflurane', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Halothane', 'role': 'assistant'}]