What is an allergy?

  • A
    An exaggerated response of the immune system to a specific antigen.
  • B
    An abnormal physiological reaction of the body to a specific allergen.
  • C
    Hypersensitivity to an allergen.
  • D
    All of the above.

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Similar Questions

Which of the following diseases is due to an allergic reaction?

$S -$ Assertion: In developed cities of India,a large number of children suffer from allergies.
$R -$ Reason: Modern lifestyle leads to a decrease in immunity.

Select the incorrect statement $w.r.t.$ allergy.

The inflammatory substance produced during allergic reactions by mast cells is:

Hypersensitivity to an allergen is due to

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