This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Uveal Tract, Subject name: Ophthalmology
[{'content': 'What is the most common ocular manifestation in rheumatoid arthritis? \nSelect and explain. \nA. Scleritis, B. Episcleritis, C. Keratoconjunctivitis sicca, D. Anterior uveitis', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. (c) Keratoconjunctivitis siccaRef: Smolin and Thoft's The cornea, 4/e, p. 517* MC systemic association of episcleritis is Rheumatoid arthritis", 'role': 'assistant'}]