Answer and Explanation 7

7.  Choice A is the correct answer.  Idiopathic Pulmonary Fibrosis IPF is a restrictive airway disease characterized by diffuse airway inflammation and scarring.  It causes reduced airway compliance and decreased diffusion across the alveolar capillary membrane.  Alpha 1 anti-trypsin deficiency is a genetic problem that can lead to emphysema which is an obstructive disease.  Chronic bronchitis and bronchiectasis are conditions that cause air trapping and lead to increased airway compliance and thus an obstructive disease.