The child blood group is (A+) that means he must have received (i) allele from the father i.e. the father genotype is (IBi). While mother can have IAIA or IAi genotype. So, the possible genotypes of all three i.e. mother, father and child respectively would be either B. ‌‌IAIA|IBi|IAi E. ‌‌IAi|IBi|IAi