Erythroblastosis Fetalis Is Defined as An

Erythroblastosis fetalis is defined as an:

A) allergic disease in which maternal blood and fetal blood are antigenically incompatible.
B) alloimmune disease in which maternal blood and fetal blood are antigenically incompatible.
C) autoimmune disease in immature nucleated cells that are released into the bloodstream.
D) autosomal dominant hereditary disease.