Below are the preliminary results of the investigation of a reported transfusion reaction. The transfusion was stopped after infusion of about 1/2 of a unit of packed cells because the patient developed a fever. The post transfusion sample was collected within 30 minutes of the time the transfusion was stopped. A review of records revealed that the patient was a group A positive, while donor was group O negative. DAT Serum hemolysis Pretransfusion sample negative absent Posttransfusion sample negative absent These results suggest the patient:
a. May be having a transfusion reaction, but is non hemolytic
b. Is not having a transfusion reaction
c. Is having an acute hemolytic transfusion reaction
d. Is having a delayed hemolytic transfusion reaction