Which class of immunoglobulin is the first to be produced in response to an infection?

उत्तर: (C) IgM

• (A) चूक

  Wrong: IgG dominates later (secondary) responses.

• (B) चूक

  Wrong: IgA protects mucosal surfaces.

• (C) बरोबर

  Correct: IgM (a pentamer) is the first antibody made in a primary response.

• (D) चूक

  Wrong: IgE is involved in allergy and parasites.