What Can Be Concluded in a Patient Who Has Anti-K

Multiple Choice

What can be concluded in a patient who has anti-K identified in his serum but phenotypes positive for K antigen?

A) Kell antiserum was omitted.
B) Patient was recently transfused with K-positive blood.
C) Anti-K was misidentified
D) Patient was recently transfused with K-positive blood and Anti-K was misidentified