Question

when the body has a hypersensitivity reaction to common substances, it is know as
lymphoma.
antigen.
allergy.
tonsilitis.

Explanation:

An allergy is defined as the body's hypersensitivity reaction to common substances. Lymphoma is a cancer of the lymphatic system. An antigen is a substance that can trigger an immune response. Tonsillitis is inflammation of the tonsils.

Answer:

C. allergy