The genotypes of a husband and wife are $I^AI^B$ and $I^Ai$. Among the blood types of their children,how many different genotypes and phenotypes are possible?
- A$3$ genotypes; $4$ phenotypes
- B$4$ genotypes; $3$ phenotypes
- C$4$ genotypes; $4$ phenotypes
- D$3$ genotypes; $3$ phenotypes
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