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
Diffusion hypoxia is seen with – 
Select and explain. 
A. Ether, B. Cyclopropane, C. Halothane, D. Nitrous oxide
D: Nitrous oxide
Answer: D: Nitrous oxide 
Explanation: Beside N2O, Xenon can cause diffusion hypoxia during recovery.
Diffusion hypoxia occurs in first 5-10 minutes of recovery.