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: Physiology
Right shift of oxygen dissociation curve is caused by? 
Select and explain. 
A. Hypothermia, B. Hypoxia, C. Alkalosis, D. HbF
B: Hypoxia
Answer: B: Hypoxia 
Explanation: Ans. is `b' i.e., Hypoxia