Question

it is known that blood group A can be donated to individual with blood group AB. but how can it be possible as blood group A as antibody b which may clump with antigenB of blood AB?

Answer 1

Since the recipient has blood group AB, his body continuously produce blood cells with this antigens. The donor blood contain very little amount of anti-B antibody, which can only clump few blood cells and this can be overcome by production of more blood cells of this type by host's body.