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Asthma may be attributed to
A
allergic reaction of most of the cells in the lungs.
B
inflammation of the trachea.
C
accumulation of fluid in the lungs.
D
bacterial infection of the lungs.
Explanation
Asthma is an allergic response.
Detailed Solution
Asthma is an allergic disease involving severe inflammation and constriction of bronchioles. Some pollen grains cause severe allergic reactions of mast cells in the lungs, leading to asthma.
