QBANK A 20-year-old man comes to your clinic with complaints of a cough that he says he has had for the past month. He is usually in good health and is tak

[zahra.sham]

A 20-year-old man comes to your clinic with complaints of a cough that he says he has had for the past month. He is usually in good health and is taking no medications. He says that the cough is nonproductive, but it is worse at night and often keeps him awake. He denies having fever or other constitutional symptoms. On physical examination, he appears well nourished, with normal vital signs and a room air oxygen saturation of 98%. You review in your mind the differential diagnosis for a chronic cough as you prepare to examine him. Which of the following is the most common cause of a chronic cough?

A. Gastroesophageal reflux disease (GERD)
B. Asthma
C. Postnasal drainage
D. TB
E. Use of an ACE inhibitor