Answer: The possible blood types are A and B.
Explanation: Blood types are classified on the basis of the antigen type present in an individual. There are two types of antigens, antigen A and B. An individual with blood type O has no antigen, while an individual with blood type AB has both antigens. An individual with blood type A has antigen A while an individual with blood type B has antigen B. When A woman with blood type O crosses with a man with blood type AB, the child inherits no antigen from the mother but inherits either antigen A or B from the father.
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