Which of the following conditions cause erythroblastosis foetalis?

Step-by-step solution

A special case of Rh incompatibility (mismatching) has been observed between the Rh - ve blood of a pregnant mother with Rh + ve blood of the foetus. The Rh - ve mother is not usually exposed to the Rh antigen of the foetus during the first pregnancy as the foetal and maternal blood are normally kept well separated by the placental barriers. However, at the time of the birth of the first child, there is a possibility of exposure of the maternal blood to a small amount of Rh + ve blood from the foetus. Hence, the bo