<prompt> HLA-B27 is associated with -Ankylosing spondylitisRheumatoid arthritisChronic active hepatitisDiabetes  <response>: Ans. is a i.e., Ankylosing spondylitis o HLA-B27is associated with seronegativespondyloartropathies ankylosingspondylitis. Psoriatic arthritis, Reiters syndrome, reactive arthritis and acute anterior uveitis 