ANSWER IS.AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA I THNK
EXPLANATION
Multicellular Organisms Are Made Of More Than One Cell. They Are Not Just One Cell. Hence The Name "Multi." If They Were One Cell, They Wouldn't Really Be An Organism.
~Spades15
If there is no antigen the blood group is 0 !!
extra info ; if both antigen - AB