This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mechanics of Respiration, Subject name: Physiology
V/Q ratio at the base of lung- 
Select and explain. 
A. 1, B. 3, C. 0.6, D. 1.8
C: 0.6
Answer: C: 0.6 
Explanation: Ans. is 'c' i.e., 0.6 o Overall V/Q ratio of lung-0.8o V/Q ratio at apex-3.0 (maximum)o V/Q ratio at base-0.6 (Least)