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
What is the most common ocular manifestation in rheumatoid arthritis? 
Select and explain. 
A. Scleritis, B. Episcleritis, C. Keratoconjunctivitis sicca, D. Anterior uveitis
C: Keratoconjunctivitis sicca
Answer: C: Keratoconjunctivitis sicca 
Explanation: Ans. (c) Keratoconjunctivitis siccaRef: Smolin and Thoft's The cornea, 4/e, p. 517* MC systemic association of episcleritis is Rheumatoid arthritis