<prompt> Marked decreased FVC and FEV1FVC ratio are seen in -AsthmaKyphosisScoliosisFibrosis of lung  <response>: Ans. is a i.e., Asthma Differences between Obstructive and Restrictive respiratory DiseasePFT resultObstructive PatternRestrictive patternFEV1Decreased 80 predicted Decreased out of proportion to FVCDecreased May be preservedDecreased in proportion to FVCFVCDecreased May be preservedDecreased 80 predictedFEV1FVC FEV1Decreased 0.7Normal or Increased 0.7FEF25-75 50 predictedDecreased in proportion to loss of lung volumeTLCNormal or elevatedDecreasedDLCONormalDecreased in EmphysemaDecreased in intrinsic restrictive lung disease Normal in neuromuscular or musculoskeletal restrictive disease 