A request for 8 units of RBCs was received for patient LF. The patient has a negative antibody screen, but 1 of the 8 units was 3+ incompatible at the AHG phase. Which of the following antibodies may...

A request for 8 units of RBCs was received for patient LF. The patient has a negative antibody screen, but 1 of the 8 units was 3+ incompatible at the AHG phase. Which of the following antibodies may be the cause?

a. Anti-K

b. Anti-Le^a