when blood with blood group O transfusedto a person with blood group AB cant the antibody present in the plasma of the blood with blood group O react with the antigens of blood with the blood group AB . why.
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Solution
It is because the anti-A and anti-B antibody are absent in the person with blood group 'O'. Hence, no agglutination reaction occurs. That is the reason why blood group 'O' is known as universal donor.