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: Ophthalmology
Scleritis is most commonly associated with: 
Select and explain. 
A. Polyaeritis nodosa, B. Tuberculosis, C. Rheumatoid ahritis, D. Sarcoidosis
C: Rheumatoid ahritis
Answer: C: Rheumatoid ahritis 
Explanation: Ans. Rheumatoid ahritis