What characteristic must blood selected for exchange transfusion possess regarding maternal antibodies?

Blood selected for exchange transfusion must lack red blood cell antigens that correspond to maternal antibodies to prevent hemolytic reactions. In cases where maternal antibodies are present, particularly in situations involving hemolytic disease of the newborn, it is crucial that the transfused blood does not contain antigens that the maternal antibodies can target. If the blood has these antigens, maternal antibodies can attach to and destroy the transfused red blood cells, potentially leading to serious complications such as hemolysis and further exacerbation of the newborn's condition.

The other options do not fully address the essential requirement for preventing adverse reactions during an exchange transfusion. For instance, while the age of blood is significant to ensure the viability of red blood cells, the main concern in this context is the presence of antigens. Compatibility with the father or the donor is less relevant to the specific need to avoid maternal antibody reactions. Thus, the primary focus is on selecting blood that will not react adversely due to the existing maternal antibodies.