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': 'Least diffusion coefficient is for – \nSelect and explain. \nA. Isoflurane, B. Enflurane, C. Halothane, D. N2O', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Amongst the given options, N2O has minimum diffusion coefficient.', 'role': 'assistant'}]