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
All of the following statements are true about V/Q ratio except 
Select and explain. 
A. At Apex of lung there is high Ventilation Perfusion ratio, B. There is no change of V/Q ratio due to postural change, C. High PAO2 is found at apex of lung, D. Low PACO2 is found at base of lung
D: Low PACO2 is found at base of lung
Answer: D: Low PACO2 is found at base of lung 
Explanation: None