Asthma may be attributed to

Options

(a) bacterial infection of the lungs
(b) allergic reaction of the mast cells in the lungs
(c) inflammation of the trachea
(d) accumulation of fluid in the lungs

Correct Answer:

allergic reaction of the mast cells in the lungs

Explanation:

Asthma is an allergic reaction characterised by spasm of bronchi muscles because of an effect of histamine released by mast cells.