<prompt> All of the following are true about interstitial lung disease, Except:Decreased FVCDecreased FEV1Decreased FEV 1 FVCDecreased Diffusion capacity  <response>: Answer is C Decreased FEVIFVC: Interstial lung diseases produce a restrictive pattern on Pulmonary function testing and are characterized by a normal or elevated FEVIFVC ratio which is greater than 0.7 FEV and FVC are both reduced in interstitial lung disease but the decrease in FEVI is in propoion to decrease in FVC and hence the FEVIFVC ratio is normal or increased 