Group B individuals have which antibody in their serum?

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Multiple Choice

Group B individuals have which antibody in their serum?

Explanation:
Group B individuals have B antigens on their red blood cells, so their plasma contains antibodies against the A antigen that they do not possess. This anti-A antibody is what would be found in their serum. The antibody against B would be present in people who lack B antigen (types A or O), not in type B individuals. Type O would have both anti-A and anti-B, while type AB has neither. So anti-A is the antibody present in the serum of group B individuals.

Group B individuals have B antigens on their red blood cells, so their plasma contains antibodies against the A antigen that they do not possess. This anti-A antibody is what would be found in their serum. The antibody against B would be present in people who lack B antigen (types A or O), not in type B individuals. Type O would have both anti-A and anti-B, while type AB has neither. So anti-A is the antibody present in the serum of group B individuals.

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