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
Optic nerve fibres once cut, do not regenerate because they are not covered by: 
Select and explain. 
A. Myelin sheath, B. Neurilemma, C. Both of the above, D. None of the above
B: Neurilemma
Answer: B: Neurilemma 
Explanation: Ans. Neurilemma