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
Ether is not used in modern surgical practice, because it is – 
Select and explain. 
A. Highly explosive, B. Poor anaesthetic, C. Expensive, D. Complicated apparatus needed
A: Highly explosive
Answer: A: Highly explosive 
Explanation: Ether is highly inflammable and explosive.