<prompt> HLA-DR4 is a marker of -Rheumatoid arthritisSarcoidosisSero-negative gouty arthritisPsoriasis  <response>: Ans. is a i.e., Rheumatoid arthritis DR4 is associated witho Extra-articular rheumatoid arthritiso Hydralazine-induced femal systemic lupus erythematosuso Pemphigoid gestationaliso Pemphigus foliaceuso Obstructive hypertrophic cardiomyopathyo IgA nephropathy 