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
All of the following are features of episcleritis except: 
Select and explain. 
A. Redness, B. Marked pain, C. Photophobia, D. Lacrimation
B: Marked pain
Answer: B: Marked pain 
Explanation: Ans. Marked pain