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
Immune ring in the cornea is a feature of: 
Select and explain. 
A. Bacterial corneal ulcer, B. Fungal corneal ulcer, C. Ring ulcer of the cornea, D. Disciform keratitis
B: Fungal corneal ulcer
Answer: B: Fungal corneal ulcer 
Explanation: Ans. Fungal corneal ulcer