Which of the following is the most important risk factor for development of chronic obstructive pulmonary disease?
A)Cigarette smoking
B)Occupational exposure
C)Air pollution
D)Genetic abnormalities

Question

Quizplus · Accepted Answer

Chronic obstructive pulmonary disease (COPD) is a respiratory ailment that is comprised of three disorders: chronic bronchitis, emphysema, and asthma. Smoking is the most common cause.

Which of the Following Is the Most Important Risk Factor