Suppose a macrophage becomes a tumor cell. It should present the tumor antigens synthesized in the cytoplasm of the cell on _______; if the macrophage phagocytizes a dead tumor cell, the macrophage would process the tumor antigens and present the antigens on its ______.
a. MHC I/ MHC II
b. MHC II/ MHC II
c. MHC I/ MHC I



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