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': 'Which anaesthetic drug contributes to green house effect? \nSelect and explain. \nA. Enflurane, B. Desflurane, C. Sevoflurane, D. Halothane', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Desflurane", 'role': 'assistant'}]