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
High oxygen tension in alveoli is due to 
Select and explain. 
A. Right to left shunt, B. Ventilation perfusion mismatch, C. Bronchial asthma, D. Inapporpriate gas exchange
B: Ventilation perfusion mismatch
Answer: B: Ventilation perfusion mismatch 
Explanation: None