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
Which of the following has minimum MAC ? 
Select and explain. 
A. Methoxyflurane, B. N2O, C. Halothane, D. Desflurane
A: Methoxyflurane
Answer: A: Methoxyflurane 
Explanation: Methoxyflurane has minimum MAC and is most potent. Order of potency in decreasing order (MAC in increasing order) :-

Methoxyflurone (MAC= 0.16%)> Trilene (0.2%) > Halothane (0.74%) > Chloroform (0.8%) > Isoflurane (1.15%) > Enflurane (1.68%) > Ether (1.92%) > Sevoflurane (2.0%) > Desflurane (6.0%) > Cyclopropane (9.2%) > N20 (104%).