What induces the production of antibodies?

• A. Antigens
• B. Polyclonal Antibodies
• C. Hybridomas
• D. Red Blood Cells

Answer: (A)

Antigens trigger antibody production. When a foreign substance enters the body, its specific parts (epitopes) are recognized by B cell receptors. This recognition, often with help from helper T cells, activates B cells to proliferate and differentiate into plasma cells that secrete antibodies, and also to form memory B cells for faster responses in the future. The other options are not the initiators: polyclonal antibodies are antibodies produced by many B cell clones in response to an antigen, not the trigger itself; hybridomas are lab-created cells used to produce a single type of antibody; red blood cells are not what starts antibody production (they can be targets of antibodies, but they don’t induce production).