If a child belonged to blood type o, he or she could not have been produced by which set of parents?

The blood types (A, B, and O) are controlled by the multiple alleles kind of genes.
Two O blood type parents can produce a child with only O blood type. Two parents with A blood type can produce a child with either A or O blood types. Two parents with B blood type can produce a child with either B or O blood type. One parent with A and another with B can produce a child with A, B, AB or O blood types.
If a child belonged to blood type o, he or she could not have been produced by Type AB mother and type O father.

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