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
Episcleritis is commonly associated with: March 2012 
Select and explain. 
A. Trachoma, B. Rheumatoid ahritis, C. Cataract extraction surgery, D. Usually associated with none
B: Rheumatoid ahritis
Answer: B: Rheumatoid ahritis 
Explanation: Ans: B i.e. Rheumatoid ahritis Scleritis & associations A history of rheumatoid ahritis is commonly obtained in patients with episcleritis Cataract extraction surgeries may be associated with scleritis Posterior scleritis is usually not associated with any systemic disease