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
Total alveolar ventilation volume (in 1:./min) is: 
Select and explain. 
A. 1.5, B. 3.5, C. 4.2, D. 5
C: 4.2
Answer: C: 4.2 
Explanation: C i.e. 4.2