Assertion :Erythroblastosis foetalis is disease related with Rh factor and may cause death of developing inside womb. Reason: It causes massive destruction of erythrocytes in foetus that leads to anaemia and tissue damage of foetus

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Both Assertion and Reason are incorrect.

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
In erythroblastosis foetalis, the foetus is always Rh positive and mother Rh negative. During embryonic development, the Rh positive blood of foetus is mixed with Rh negative blood of mother i.e., Rh factor antibodies formed in mother's blood, which cause clumping of RBC of foetus during next pregnancy.

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