This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Pharmacology
Ether is still used as a general anaesthetic in lndia, specially in peripheral hospitals because: 
Select and explain. 
A. It is non-explosive, B. It is pleasant smelling and non irritating, C. It induces anaesthesia rapidly, D. It is cheap and can be administered without anaesthetic machine
D: It is cheap and can be administered without anaesthetic machine
Answer: D: It is cheap and can be administered without anaesthetic machine 
Explanation: (Ref: KDT 6/e p371) Ether is the only complete anaesthetic agent. It is highly inflammable and explosive. It has good analgesic and muscle relaxant action. It can be delivered by open method. It is a pungent smelling liquid. Induction of anaesthesia with ether is quite slow. All the four stages can be seen.