Surgery Cord red blood cells from an infant suspected of having hemolytic disease of the newborn is most likely to be tested by which of the following? A Passive hemagglutination test B Hemagglutination inhibition test C Nephelometry D Direct coombs test 💡 Explanation Cord red blood cells from an infant suspected of having hemolytic disease of the newborn is most likely to be tested by which of the following? ✓ Correct Answer: D. Direct coombs test