16.In which of the following situations, there is risk of Erythroblastosis foetalis: A. Mother Rh+, father Rh+ B. Mother Rh-, father Rh- C. Mother Rh-, father Rh+ D. Mother Rh+, father Rh
Option C Erythroblastosis fetalis also called hemolytic disease of the newborn, type of anemia in which the red blood cells (erythrocytes) of a fetus are destroyed in a maternal immune reaction resulting from a blood group incompatibility between the fetus and its mother. This happens during second pregnancy when the mother's immune system is already sensitized to Rh+ antigens present on the blood cells of the foetus during the first pregnancy. The Rh gene being dominant, the feotus will be Rh+ if anyone of the parent is Rh+.
