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
All of the following are true for medullated nerve fibres of the retina except: 
Select and explain. 
A. Appear as a whitish patch usually present around the disc, B. Are commonly seen at bih in premature children, C. Disappear in patients with optic atrophy, D. May cause enlargement of blind spot
B: Are commonly seen at bih in premature children
Answer: B: Are commonly seen at bih in premature children 
Explanation: Ans. Are commonly seen at bih in premature children