A) husband is \[R{{h}^{-}}\] and wife \[R{{h}^{-}}\]
B) wife is \[R{{h}^{-}}\]and husband \[R{{h}^{-}}\]
C) wife is \[R{{h}^{-}}\]and husband \[R{{h}^{+}}\]
D) wife is \[R{{h}^{-}}\]and husband \[R{{h}^{+}}\]
Correct Answer: D
Solution :
If father's blood is \[R{{h}^{4}}\] and mother's blood is \[R{{h}^{+}}\] the foetus' blood will R blood of mother has not previously come in contact with \[R{{h}^{+}}\] blood through transfusion, her first child does not suffer although the \[K{{h}^{+}}\] blood of foetus stimulates the formation of anti Rh factors or antibodies in the mother's blood yet much anti Rh factors are not produced in the mother's blood to harm the foetus. But in the subsequent Rh+ foetus, the anti Rh factors (antibodies) of the mother's blood destroy the foetal red blood corpuscles. This situation results in haemolytic disease of the newborn (HDN), which is called erythroblastosis foetalis.
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