Which of the Following Statements Is Incorrect or False

Multiple Choice

Which of the following statements is incorrect or false?

A) Class I MHC molecules are built into the plasma membranes of all body cells.
B) Class II MHC molecules appear only on the surface of antigen-presenting cells, thymic cells, and T cells that have been activated by exposure to antigens.
C) Haptens lack immunogenicity unless attached to protein carriers.
D) MHC proteins are the cell's identity markers.