MHC Class II Molecules Are Made Up of Two Chains

MHC class II molecules are made up of two chains called _______,whose function is to bind peptides and present them to _______ T cells:

A) alpha (α) and beta (β) ; CD4
B) alpha (α) and beta₂-microglobulin (β₂m) ; CD4
C) alpha (α) and beta (β) ; CD8
D) alpha (α) and beta₂-microglobulin β₂m) ; CD8
E) alpha (α) and beta (β) ; γ:δ T cells.