The genotypes of a husband and wife are IAIB and IAi. Among the blood types of their children, how many different genotypes and phenotypes are possible?

The genotype of a husband and wife are IAIB and IAi.
Four different possible genotypes of their children are: IAIB, IAI, IBI, ii
The possible number of phenotypes of their children are:
Blood group A (IAIA, IAi)
Blood group B (IBI)
Blood group AB (IAIB)
Blood group O (ii)
Thus, there are 4 possible genotypes and 4 possible phenotypes. Therefore, the correct answer is not listed among the options. The closest option is 4 genotypes; 4 phenotypes but the solution shows that there are 4 genotypes and 4 phenotypes, not 3.