Question

Cell-mediated immunity is provided by all of the following EXCEPT:

• A. \( \text{Macrophages} \)
• B. \( \text{NK-cells} \)
• C. \( \text{T-lymphocytes} \)
• D. \( \text{B-lymphocytes} \)

Hint:

T-lymphocytes are crucial for adaptive immunity, distinguishing infected cells from healthy ones through antigen presentation.

Answer 1

The Correct Option is D

Cell-mediated immunity is primarily mediated by T-lymphocytes, macrophages, and NK cells, which directly attack infected or abnormal cells. B-lymphocytes, however, are part of humoral immunity, producing antibodies instead of engaging in direct cell-mediated responses. Thus, B-cells do not contribute significantly to cell-mediated immunity.