(A) Incorrect → A special case of Rh incompatibility has been observed between the Rh-ve blood of a pregnant mother with Rh+ve blood of the foetus. (B) Correct → Rh antigen is observed on the surface of RBCs of majority (nearly 80 percent) of humans. (C) Correct → Before blood transfusion, Rh group should also be matched to avoid severe problems of destruction of RBCs. (D) Correct → Rh incompatibility (Erythroblastosis foetalis) is observed when a pregnant mother is Rh−ve and the foetus is Rh+ve. (E) Incorrect → Erythroblastosis foetalis can be avoided by administering anti-Rh antibodies to the mother immediately after the delivery of the first child. Thus, the incorrect statements are (A) and (E).
