Question
Select the incorrect statement with reference to Rh grouping.
A. Erythroblastosis foetalis is a condition observed having foetus with ${Rh}^{- ve}$ blood and mother with ${Rh}^{+ ve}$ 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 ${Rh}^{- ve}$ and the foetus is ${Rh}^{+ ve}$.
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:
Options
Solution
Sol. [Key Concept: Rh grouping — erythroblastosis foetalis]
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).
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