Given below are two statements. One is labelled Assertion (A) and the other is labelled Reason (R). 

Assertion (A): Erythroblastosis foetalis can be prevented by administering anti-Rh antibodies to the mother immediately after the delivery of the first child.

Reason  (R): These antibodies prevent sensitisation of the mother by facilitating the destruction of the foetal Rh+ve RBCs that enter maternal blood.

In light of the above statements, choose the correct answer from the options given below.

Both (A) and (R) are true and (R) is the correct explanation of (A).

Assertion (A) states that erythroblastosis foetalis can be prevented by administering anti-Rh antibodies to the mother immediately after the delivery of the first child. This is true because the administration of anti-Rh antibodies is a preventive measure to avoid sensitization of the mother's immune system.

Reason (R) provides the explanation for Assertion (A), stating that these antibodies prevent sensitization of the mother by destroying the fetal Rh-positive red blood cells that enter the maternal blood. This is also correct because anti-Rh antibodies target and destroy Rh-positive red blood cells in the mother's circulation, preventing her immune system from mounting an immune response against these cells, which could lead to erythroblastosis foetalis in subsequent pregnancies.