<prompt> Marked decreased FEV1 and FEV1 FVC ratio are seen inAsthmaKyphosisScoliosisFibrosis of lung  <response>: In obstructive diseases like asthma,marked fall in FEV1 and FEV1FVC ratio is present.In restrictive diseases like kyphoscoliosis and fibrosis,lung volumes like TLC,FRC,RV as well as FVC are lowered.Maximal expiratory flows like FEV1 are also reduced compared with normal values,but are relatively elevated when considered in relation to lung volumes.So FEV1FVC ratio will be normal or slightly increased Ref:Harrisons medicine-18th edition,page no:2093. 