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
[{'content': 'Scleritis is most commonly associated with: \nSelect and explain. \nA. Polyaeritis nodosa, B. Tuberculosis, C. Rheumatoid ahritis, D. Sarcoidosis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Rheumatoid ahritis', 'role': 'assistant'}]