A) antigen presenting cell and a B lymphocyte.
B) antigen presenting cell and a T lymphocyte
C) NK cell and its target cell.
D) CTL and its target cell.
E) antigen presenting cell and a plasma cell.

Question

A) antigen presenting cell and a B lymphocyte. 
B) antigen presenting cell and a T lymphocyte 
C) NK cell and its target cell. 
D) CTL and its target cell. 
E) antigen presenting cell and a plasma cell.

Quizplus · Accepted Answer

The interaction between an antigen presenting cell (such as a dendritic cell) and a T lymphocyte is essential for initiating an adaptive immune response. The antigen presenting cell presents antigen to the T lymphocyte via its major histocompatibility complex (MHC) molecules, which then activates the T lymphocyte to proliferate and differentiate into effector cells that can eliminate the pathogen.

A) Antigen Presenting Cell and a B Lymphocyte