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 one of the following is the fastest acting inhalational agent ? \nSelect and explain. \nA. Halothane, B. Isoflurane, C. Ether, D. Sevoflurane', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Amongst the given options, sevoflurane has minimum B : G partion coefficien (0.69) → fastest acting amongst the\xa0given options.\nOnly Desflurane, cyclopropane & N2O are faster acting than sevoflurane.', 'role': 'assistant'}]