Question

Erythroblastosis foetalis is caused when fertilisation takes place between gametes of

• A. $R{h}^{-}$ female and $R{h}^{+}$ male.
• B. $R{h}^{+}$ female and $R{h}^{-}$ male.
• C. $R{h}^{+}$ female and $R{h}^{+}$ male.
• D. $R{h}^{-}$ female and $R{h}^{-}$ male.

Answer 1

Answer: (A)

$R{h}^{-}$ female and $R{h}^{+}$ male.

Erythroblastosis foetalis is caused by transplacental transmission of maternal antibodies to foetal RBCs when mother is Rh- and the foetus is Rh+.

So, the correct option is 'Rh- female and Rh+ male'