A) no antibodies
B) no antigens
C) A or B antibodies
D) A or B antigens
Correct Answer: B
Solution :
Man has mainly 4 types of blood groups \[A,\,\,B\] \[AB\] or\[O\]. \[A\] blood group has \[A\] antigens and b antibody, \[B\] has \[B\] antigens and a antibody, \[AB\] has no antibodies but \[A\,\,B\] antigens while blood group \[O\] has no antigens but \[a\,\,\text{and}\,\,b\] antibodies. This makes \[AB\] a universal acceptor and \[O\] a universal donor.
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