Select the incorrect statements with reference to Rh grouping :
A. Erythroblastosis foetalis is a condition observed having foetus with \(Rh ^{-v e}\) blood and mother with Rh \(+v e\) blood.
B. Rh antigen is observed on RBCs in the majority of human beings.
C. Before blood transfusion, Rh group should also be matched.
D. Rh incompatibility is observed when a pregnant mother is \(Rh ^{-v e}\) and the foetus is \(Rh ^{+v e}\).
E. Erythroblastosis foetalis can be avoided by administering anti-Rh antibodies to the mother immediately after the delivery of the second child.
Choose the answer from the options given below :

(C) A and E only
Statement A is incorrect because erythroblastosis foetalis occurs when a pregnant mother is \(Rh ^{-v e}\) and the foetus is \(Rh ^{+v e}\).
Statement B is correct as nearly \(80 \%\) of humans have the Rh antigen on the surface of their RBCs.
Statement C is correct because Rh compatibility must be checked before blood transfusion to prevent immune reactions.
Statement D is correct as Rh incompatibility arises when an \(Rh ^{-v e}\) mother carries an \(Rh ^{+v e}\) foetus.
Statement E is incorrect because erythroblastosis foetalis is prevented by administering anti-Rh antibodies to the \(Rh ^{-v e}\) mother immediately after the delivery of her first \(Rh ^{+v e}\) child, not the second child.
Thus, statements A and E are incorrect.