This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Inhalational Anesthetic Agents, Subject name: Anaesthesia
Which is false regarding ether? 
Select and explain. 
A. Highly inflammable, B. Causes hyperglycemia, C. Good muscle relaxation, D. Rapid recovery
D: Rapid recovery
Answer: D: Rapid recovery 
Explanation: Ether anaesthesia has major demerit of slow induction and slow recovery.