Which antibody is released in response to allergy?

The correct answer is Option (3) → IgE

Option (3) IgE — Correct. In an allergy the body makes IgE antibodies against the allergen. These make mast cells release histamine and serotonin, which cause sneezing, watery eyes and difficulty in breathing.

Note: A similar question was also asked in CUET (UG) 2026 on 25-05-2026 (Slot 1).

NCERT Extract:
Allergies – “The exaggerated response of the immune system to certain antigens present in the environment is called allergy. The substances to which such an immune response is produced are called allergens. The antibodies produced to these are of IgE type. Common examples of allergens are mites in dust, pollens, animal dander, etc. Symptoms of allergic reactions include sneezing, watery eyes, running nose and difficulty in breathing. Allergy is due to the release of chemicals like histamine and serotonin from the mast cells.”