The Direct Pathway of Allorecognition Involves Interaction of _____,Whereas the Indirect

The direct pathway of allorecognition involves interaction of _____,whereas the indirect pathway of alloreaction involves interaction of _____.

A) donor T cells with allogeneic HLA molecule on recipient dendritic cells; recipient T cells with allogeneic HLA molecules on donor dendritic cells
B) recipient T cells with allogeneic HLA molecules on donor dendritic cells; donor T cells with allogeneic HLA molecule on recipient dendritic cells
C) recipient T cells with allogeneic HLA molecules on donor dendritic cells; recipient T cells with peptides of allogeneic HLA molecules on recipient dendritic cells
D) recipient T cells with peptides of allogeneic HLA molecules on recipient dendritic cells; donor T cells with peptides of allogeneic HLA molecules on donor dendritic cells.