What Is the Linkage Disequilibrium in Reference to the HLA

Multiple Choice

What is the linkage disequilibrium in reference to the HLA antigens?

A) Occurrence of HLA genes more frequently in the same haplotype than would be expected by chance alone
B) Displacement of HLA genes on different chromosomes
C) Occurrence of HLA genes less frequently in the same haplotype than would be expected by chance alone
D) Crossover of HLA genes