Question

These cells are capable of producing antibodies

• A. B-lymphocytes
• B. T-lymphocytes
• C. TH-cells
• D. NK-cells

Hint:

B-cells → antibody production; T-cells → cell-mediated immunity; Helper T (TH) → activate B-cells and cytotoxic T-cells; NK cells → innate immunity. Remember the functional distinction between humoral and cell-mediated immunity.

Answer 1

The Correct Option is A

B-lymphocytes (B-cells) differentiate into plasma cells which secrete antibodies (immunoglobulins) specific to antigens. T-lymphocytes provide cell-mediated immunity but do not produce antibodies. TH cells (helper T) stimulate B-cells. NK cells kill virus-infected or tumor cells.