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
Least blood gas paition coeficient anesthetic agent: 
Select and explain. 
A. Desflurane, B. Nitrous oxide, C. Halothane, D. Ether
A: Desflurane
Answer: A: Desflurane 
Explanation: A i.e. Desflurane