alleryStart learning →ABO-only red cells: anti-B in A plasma rules out which donor pair?
AGroups O and B
BGroups B and AB
CGroups A and AB
DGroups A and O
Answer & Solution
Correct answer: B. Groups B and AB
In the ABO-only red-cell model, anti-B antibodies in group A plasma react with B antigens on group B and AB red cells.
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