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: Medicine
Unilateral diaphragmatic paralysis cause 
Select and explain. 
A. No change is total Lung capacity, B. Increase in forced vital capacity, C. Decrease in inspiratory reserve volume, D. No change in maximum breathing capacity
C: Decrease in inspiratory reserve volume
Answer: C: Decrease in inspiratory reserve volume 
Explanation: Hemi diaphrogm palsy results in : 

↓ TLC
↓ FVC
↓ IRV
↓ Normal FEV1 and FRC