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
Absence of Lamina cribrosa occurs in 
Select and explain. 
A. Optic nerve hypoplasia agenesis, B. Morning glory syndrome, C. Drusen, D. Non opthalmia
B: Morning glory syndrome
Answer: B: Morning glory syndrome 
Explanation: B i.e. Morning glory syndrome