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': 'Ciliary staphyloma occurs due to all of the following except: \nSelect and explain. \nA. Scleritis, B. Perforating injury, C. Absolute glaucoma, D. Episcleritis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. Episcleritis', 'role': 'assistant'}]