Question

What can result in chronic bronchitis?

a.

Repeated attacks of acute bronchitis

b.

Exposure to pollutants in the air

c.

Ingesting harmful chemicals

d.

All of the above

Answer: (a).Repeated attacks of acute bronchitis Explanation:Repeated attacks of acute bronchitis can weaken and irritate bronchial airways over a period of time, resulting in chronic bronchitis.

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Q. What can result in chronic bronchitis?

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