A) antigen A and antibody b
B) antigen B and antibody a
C) both antibodies
D) no antibody and no antigen
Correct Answer: A
Solution :
Blood group A has antigen-A and antibody-b. Blood group B has antigen B and antibodv-a. Blood group AB have both A and B antigens but none antibodies whereas blood group O have no antigen but both antibodies a and b are present.
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