The Two Major Functional Classes of Effector T Lymphocytes Are

Multiple Choice

The two major functional classes of effector T lymphocytes are:

A) Helper T lymphocytes and cytotoxic T lymphocytes
B) Natural killer cells and cytotoxic T lymphocytes
C) Memory T cells and effector T cells
D) Helper cells and antigen-presenting cells
E) Cytotoxic T lymphocytes and target cells