An Allergen is A(n)

Question

An allergen is a(n)
A) antibody.
B) macrophage.
C) lymphokine.
D) antigen.

Accepted Answer

An allergen is a type of antigen that can trigger an allergic reaction. Antigens are molecules that are recognized by the immune system and can elicit an immune response. Allergens are specifically recognized by the IgE antibodies on mast cells, which then release histamine and other chemicals that cause the symptoms of an allergic reaction.