When a complement-dependent cytotoxicity test was performed using standard antibodies to HLA A1, A3, B2, and B11, the following microscopic results were obtained: a majority of blue cells were seen with anti-A1, A3, and B11. Based on these results, what is the phenotype of the donor cells?
A) HLA A1, B11
B) HLA B2 only
C) HLA A1, A3, B11
D) cannot be determined from these results
Ans: C) HLA A1, A3, B11
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