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: Pharmacology
Anaesthetic agent which is explosive in the presence of cautery : 
Select and explain. 
A. Nitrous oxide, B. Ether, C. Trilene, D. Halothane
B: Ether
Answer: B: Ether 
Explanation: Ether is an explosive agent and should not be used with cautery.