This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anesthesia, Subject name: Pharmacology
"MAC" of desflurane is: 
Select and explain. 
A. 1.15, B. 2, C. 4, D. 6
D: 6
Answer: D: 6 
Explanation: In 20-30 year old patients Minimum Alveolar Concentration(MAC)for Halothane. 0.75 Isoflurane. 1.15 Sevoflurane. 1.85 Desflurane. 6 From Tripati 7th edition