Antibodies are produced by:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → B-lymphocytes
Two kinds of lymphocytes carry out the primary and secondary immune responses: B-lymphocytes and T-lymphocytes.
(1) Leukocytes — Incorrect. Leukocytes (white blood cells) are a wide group. It includes neutrophils, monocytes and lymphocytes, and most of them do not make antibodies.
(2) T-lymphocytes — Incorrect. T-cells do not secrete antibodies themselves. They only help the B-cells to make them.
(3) B-lymphocytes — Correct. B-lymphocytes produce an army of proteins into the blood to fight the pathogens. These proteins are the antibodies.
(4) Monocytes — Incorrect. Monocytes are phagocytes. They swallow and destroy microbes, but they do not make antibodies.
NCERT Extract:
Acquired Immunity – …
