Question

a type of plasma protein that helps the body destroy foreign invaders is a(n)
antigen.
allergy.
antibody (immunoglobulin).
plasma cell

Explanation:

Antibodies (immunoglobulins) are plasma - proteins that specifically recognize and bind to foreign invaders like bacteria and viruses to help the body destroy them. Antigens are substances that trigger an immune response but are not plasma - proteins that destroy invaders. An allergy is a hypersensitive immune response. A plasma cell is a type of white blood cell that produces antibodies, not the antibody itself.

Answer:

C. antibody (immunoglobulin)