This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology and Rheumatology, Subject name: Medicine
[{'content': "For extra-articular manifestation of RA, select the most likely diagnosis.Most common form of eye involvement \nSelect and explain. \nA. Felty's syndrome, B. rheumatoid vasculitis, C. episcleritis, D. Sjogren's syndrome", 'role': 'user'}, {'content': "Answer: D \nExplanation: Direct eye involvement with the rheumatoid process (episcleritis or scleritis) occurs in less than 1% of patients. However, 15-20% may develop Sjogren's syndrome with attendant keratoconjunctivitis sicca.", 'role': 'assistant'}]