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
The layer of the cornea once destroyed does not regenerate is: 
Select and explain. 
A. Epithelium, B. Bowman's membrane, C. Descemet's membrane, D. All of the above
B: Bowman's membrane
Answer: B: Bowman's membrane 
Explanation: Ans. Bowman's membrane