Erythroblastosis foetalis can occur if

  • A
    Mother is $Rh^{-}$ve and foetus is $Rh^{+}$ve
  • B
    Both mother and foetus are $Rh^{-}$ve
  • C
    Mother is $Rh^{+}$ve and foetus is $Rh^{-}$ve
  • D
    Both mother and foetus are $Rh^{+}$ve

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