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 blood of 'O' group, no "antigens are present on red cells, but both anti-A and anti-B antibodies are present in plasma. Blood group A has antigen 'a' and antibody 'B?. Blood group B has antigen 'b' and antibody 'A'. Blood group AB has antigens 'a' and 'b' but no antibody.
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