T cells do not recognize antigens on their own like B cells do$.$ In order for a T cells to interact with a foreign antigen must be processed and presented to the T cell by an Antigen Presenting Cell $($APC$).$ The peptide fragments are processed and loaded

onto a molecule known as theand then presented to the T cell receptor.

A $-$ Cytokine receptor

B $-$ Human leukocyte receptor

C $-$ major histocompatibility complex