Whats the ans for qs no. 26

Dear student,

Answer is option[a].
Erythroblastosis foetalis classically results from Rho(D) incompatibility, which develop when a woman with Rh-negative blood is impregnated by a man with Rh-positive blood and conceives a foetus ith Rh-positive blood, sometimes resulting in Haemolysis.

​​​​​​Regards.