This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Anesthetic Equipment), Subject name: Anaesthesia
O2 is given during anaesthesia to prevent- 
Select and explain. 
A. Pain, B. Hypoxia, C. Hypercapnia, D. Hypotension
B: Hypoxia
Answer: B: Hypoxia 
Explanation: None