This problem refers to the MN and ABO loci mentioned in class. It also refers to the Rh locus, which is responsible for the positive/negative part of the blood type. The Rh+ allele is dominant to the Rh- allele at this locus. Select all couples who could be the parents of a child with phenotype M, A+ based on the phenotypes at these three loci. If none of these couples could be the parents of this child, select "None of These".

Select one or more:

a. Mother Type MN, O+ and Father Type MN, A-

b. Mother Type MN, B+ and Father Type N, O+

c. Mother Type M, A+ and Father Type N, B-

d. Mother Type MN, AB- and Father Type M, O-

e. None of These