You started the transfusion of packed RBC about 1 hour ago. Your patient has suddenly developed shaking chills, muscle stiffness, and a temperature of 104.4 F (38.6 C). He appears flushed and reports a headache and nervousness. Your patient has most likely developed which type of transfusion reaction?
a) Allergic reaction
b) Hemolytic reaction
c) Febrile non-hemolytic reaction
d) Circulatory overload reaction