This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': 'All of the following are true about Rheumatoid Ahritis, Except: \nSelect and explain. \nA. HLA-DR determine genetic susceptibility, B. HLA-B27 determine genetic susceptibility, C. Anemia, D. Subcutaneous nodules', 'role': 'user'}, {'content': "Answer: B \nExplanation: Answer is B (HLA-B27 determine genetic susceptibility): HLA-B27 antigen is associated with seronegative spondyloahropathies and not Rheumatoid Ahritis. RA is associated with HLA DR alleles and may present with anemia, subcutaneous nodules and joint deformities. HLA B 27 associated seronegative spondyloahropathies Ankylosing spondylitis Psoriatic ahritis Reactive ahritis (Reiter's syndrome) Enteropathic ahritis (Associated with Inflammatory Bowel disease) Undifferentiated spondyloahropathy", 'role': 'assistant'}]