This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anaesthesia
Least MAC is of which inhalational agent 
Select and explain. 
A. Xeonon, B. Halothane, C. Sevoflurane, D. Isoflurane
B: Halothane
Answer: B: Halothane 
Explanation: Agent MAC(%)EtherHalothaneEnfluraneIsofluraneDesfluraneSevofluraneNitrous oxide 1.90.751.681.26.02.0105(Refer: Morgan and Mikhail's Clinical Anaesthesiology, 5th edition, pg no. 167-169)