Which of the following diseases is characteri | vedclass

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(A) An allergy is a hypersensitive reaction of the immune system to certain antigens present in the environment. When the immune system overreacts to

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Allergy

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(A) An allergy is a hypersensitive reaction of the immune system to certain antigens present in the environment. When the immune system overreacts to harmless substances like dust,pollen,or dander,it releases chemicals such as histamine and serotonin from mast cells. This exaggerated immune response leads to symptoms like sneezing,watery eyes,running nose,and difficulty in breathing. Therefore,allergy is the correct answer.

Which of the following diseases is characterized by an exaggerated response of the immune system?

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