This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Misc., Subject name: Physiology
The following illustration of the Spirogram showing the arrow indicates 
Select and explain. 
A. Tidal volume, B. Expiratory reserve volume, C. Vital capacity, D. Total lung capacity
C: Vital capacity
Answer: C: Vital capacity 
Explanation: (C) Vital capacity