Final Answer:
Rh incompatibility arises when an Rh-negative mother is partnered with an Rh-positive father, putting subsequent pregnancies at risk for hemolytic disease of the newborn. This scenario is not replicated in the other given options (A, B, D), making option C the most likely to result in Rh incompatibility.So the correct option is C. Rh-negative mother with an Rh-positive partner.
Step-by-step explanation:
Rh incompatibility occurs when an Rh-negative mother is carrying an Rh-positive fetus. The Rh factor is a protein found on the surface of red blood cells. If an Rh-negative mother is exposed to Rh-positive blood (usually during childbirth), her immune system may produce antibodies against Rh-positive blood. This can lead to hemolytic disease of the newborn (HDN) in subsequent pregnancies with Rh-positive fetuses.
In the given options, the situation MOST likely to result in Rh incompatibility is when an Rh-negative mother (lacking the Rh factor) is partnered with an Rh-positive father. If the fetus inherits the Rh-positive factor from the father, there is a potential for the mother's immune system to mount an immune response against Rh-positive blood in subsequent pregnancies. The other scenarios (A, B, D) involve Rh compatibility between the mother and partner, making Rh incompatibility less likely.
In summary, option C represents the highest risk for Rh incompatibility, where an Rh-negative mother is with an Rh-positive partner, increasing the likelihood of the fetus being Rh-positive and potential complications in subsequent pregnancies.So the correct option is C. Rh-negative mother with an Rh-positive partner.