A) No antigens but both a and b antibodies are present
B) A antigen and b antibody
C) Antigen and Antibody both absent
D) A and B antigens and a, b, antibodies
Correct Answer: A
Solution :
In human beings two antigens A and B are produced by\[{{I}^{A}}\]and\[{{I}^{B}}\]alleles respectively. These antigens are always present on the surface of RBCs.
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