Medicine Children of parents with which of the following blood group combinations have the highest risk of erythroblastosis fetalis: A Rh+ father and Rh+ mother B Rh+ father and Rh- mother C Rh- father and Rh+ mother D Rh- father and Rh- mother 💡 Explanation Children of parents with which of the following blood group combinations have the highest risk of erythroblastosis fetalis: ✓ Correct Answer: B. Rh+ father and Rh- mother