<prompt> A Patient with history of shoness of breath has, Decreased FEVIFVC Ratio, Normal DECO. A 200 ml increase in baseline FEV1 is observed 15 minutes after administration of bronchodilators. The likely diagnosis is:AsthmaChronic BronchitisEmphysemaInterstitial Lung Disease  <response>: Answer is A Asthma An obstructive pattern of PFTs with reduction in the ratio of FEV1; FVC along with demonstration of reversibility of airway obstruction 200 ml increase in baseline FEV1 after bronchodilator administration is typical of Asthma. 