The figure illustrates an interaction between an CTL and its

The figure illustrates an interaction between a(n) CTL and its target cell. antigen presenting cell and a plasma cell. antigen presenting cell and a B lymphocyte. antigen presenting cell and a T lymphocyte. NK cell and its target cell.

Solution

TCR (T-cell receptor) and MHC|| are complex to present APC( antigen presenting cell)

CD4 CD8 are xo stimulatory signals for activation of T-cell

So answer is Interaction between antigen presenting cell and T-lymphocytes