Unilateral diaphragmatic paralysis cause: (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
Answer is C. Hemi diaphrogm palsy results in : 

↓ TLC
↓ FVC
↓ IRV
↓ Normal FEV1 and FRC