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': 'Maximum global warming is by? \nSelect and explain. \nA. Desflurane, B. Isoflurane, C. Sevoflurane, D. Halothane', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Desflurane Desflurane is a greenhouse gas. It causes maximum global warming. Global warming potential (as an equal amount of O2) Isoflurane 210 times Sevoflurane 510 times Desflurane 1620 times", 'role': 'assistant'}]