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
Critical temperature of oxygen is? 
Select and explain. 
A. 20, B. 118, C. 36.5, D. 400C
B: 118
Answer: B: 118 
Explanation: Ans. is 'b' i.e., -118