Surgery General b7c52443 Ankylosing apondylitis is associated with ? A HLA-B27 B HLA-B-8 C HLA - DW4/DR4 D HLA - DR3 High-Yield Explanation Ans. is 'a' i.e., HLA-B27 There is strong correlation with HLA-B27 90-95% of cases are positive for HLA - B27.