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
Pulmonary function changes seen in Emphysema are 
Select and explain. 
A. ↑TLC, B. ↓RV, C. ↑FEV1, D. ↑VC
A: ↑TLC
Answer: A: ↑TLC 
Explanation: Changes in lung function tests in obstructive lung diseases- Eg: Emphysema
TLC- Increase
RV- Increase
FRC- Increase
Peak expiratory flow rate- Decrease
FEV1- Decreased out of proportion to FVC (Forced vital capacity)
Forced expiratory vital capacity (FEVC)- Normal to slightly decreased
FEV1/FEVC- Decreased (May decrease as low as 20-30%)
Changes in lung function tests in restrictive lung diseases
TLC- Decreased
RV- Decreased
FRC- Decreased
Forced mid-expiratory flow rate- Decrease
FEV1- Decreased in proportion to FVC (Forced vital capacity)
Forced vital capacity (FVC)- Decreased 
FEV1/FEVC- Near-normal or increased.
Lung compliance- decreased
Diffusion capacity- decreased