Which of the following is true about allergies? A) They result in the release of platelets from mast cells, causing the bronchioles to clot B) They are overreactions to environmental antigens such as...

Which of the following is true about allergies?

A) They result in the release of platelets from mast cells, causing the bronchioles to clot

B) They are overreactions to environmental antigens such as food or pollen

C) They result in the production of a class of immunoglobulins, the IgE antibodies

D) A and B only

E) B and C only

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The answer is (E)- B and C only.

From the very definition of an allergy, we can say that it is an over-reaction or hypersensitivity of the body's immune system towards some foreign bodies (like pollen, medicine, some foods, etc.) that is generally shown by only a few people and not others. Thus option (B) clearly holds true for an allergy.

We know that...

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