<prompt> The curve in question mark is caused by?Bronchial asthmaEmphysemaPulmonary fibrosisChronic bronchitis  <response>: Ans. c Pulmonary fibrosisRef: Ganong, 25th edp.631This is the pulmonary compliance curveIt is decreased lower curve in pulmonary fibrosisNormal curve is the middle curveIt is increased in emphysema upper curve 