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 analgesic 
Select and explain. 
A. N20, B. Ether, C. Halothane, D. Cyclopropane
C: Halothane
Answer: C: Halothane 
Explanation: C i.e. Halothane