Asthma may be attributed to:

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

Anurag Mishra Professor Asked on 2nd May 2016 in Biology.
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    Answer: (c) allergic reaction of the mast cells in the lungs 

    Anurag Mishra Professor Answered on 7th May 2016.
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