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': 'Transparency of cornea is maintained by all except: \nSelect and explain. \nA. Mitotic figures in the cornea, B. Widely separated, uniformly arranged collagen fibrils, C. Hydration of corneal epithelium, D. Unmyelinated nerve fibers', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Widely separated, uniformly arranged collagen fibrils', 'role': 'assistant'}]