The cellular immune response is mediated by

The correct answer is (b) T cells.

The cellular immune response, also known as cell-mediated immunity, is mediated by T cells (also called T lymphocytes). T cells play a central role in recognizing and eliminating infected cells or producing chemical signals that activate other immune responses.

T cells include:

– Cytotoxic T cells (CD8+): Kill infected cells or tumor cells
– Helper T cells (CD4+): Activate B cells and other immune responses
– Memory T cells: Remember specific pathogens for future immune responses