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
Anesthesia agent with least analgesic propey 
Select and explain. 
A. N20, B. Halothane, C. Ether, D. Propane
B: Halothane
Answer: B: Halothane 
Explanation: B i.e. Halothane