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
Tidal volume is calculated by: 
Select and explain. 
A. Inspiratory capacity minus the inspiratory reserve volume, B. Total lung capacity minus the reserve volume, C. Functional residual capacity minus residual volume, D. Vital capacity minus expiratory reserve volumes
A: Inspiratory capacity minus the inspiratory reserve volume
Answer: A: Inspiratory capacity minus the inspiratory reserve volume 
Explanation: A i.e. Inspiratory Capacity minus Inspiratory Reserve volume