Chronic bronchitis involves a persistent productive cough with sputum production for at least how many months per year and for at least how many consecutive years?

• A. 3 months per year for 2 consecutive years
• B. 6 months per year for 1 year
• C. 12 months per year for 3 consecutive years
• D. 4 months per year for 2 consecutive years

Answer: (A)

Chronic bronchitis is defined by a productive cough that lasts for at least three months in each year for two consecutive years. This sustained pattern distinguishes it from short-lived or single-year coughs and reflects chronic mucus hypersecretion and airway inflammation. Other duration options don’t meet the established criterion, which requires two consecutive years of 3+ months each, not just a longer spell within one year or a longer span across more than two years.