This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Flow Volume curve, Spirometry and DLCO, Subject name: Medicine
What is true for restrictive lung disease? 
Select and explain. 
A. FEV1/FVC decreased, compliance normal, B. FEV1/FVC increased, compliance increased, C. FEV1/FVC decreased, compliance increased, D. FEV1/FVC increased, compliance decreased
D: FEV1/FVC increased, compliance decreased
Answer: D: FEV1/FVC increased, compliance decreased 
Explanation: In Restrictive lung disease, parenchymal involvement will lead to pulmonary fibrosis and hence it will be difficult to inflate the lung leading to the reduction in lung compliance. The FEV1/ FVC ratio is increased in restrictive lung disease because the numerator and denominator in the ratio are both reduced in restrictive lung disease, with FVC decreasing dispropoionately.