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 volume is? 
Select and explain. 
A. After normal inspiration, B. After normal expiration, C. After forceful expiration, D. After forceful inspiration
A: After normal inspiration
Answer: A: After normal inspiration 
Explanation: Ans:A. After normal inspirationFunctional Residual Capacity (FRC) is the volume of air present in the lungs at the end of passive expiration.