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
Functional residual capacity is: 
Select and explain. 
A. Volume remaining after forced expiration, B. Tidal volume + volume inspired forcefully, C. Volume remaining after normal expiration, D. Tidal volume + volume expired by forced expiration
C: Volume remaining after normal expiration
Answer: C: Volume remaining after normal expiration 
Explanation: C i.e. Volume remaining after normal expiration