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: Surgery
The action of adrenaline is potentiated in the presence of all except: 
Select and explain. 
A. Halothane, B. Ethyl chloride, C. Cyclopropane, D. Ether
D: Ether
Answer: D: Ether 
Explanation: None