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 causes of leukocoria except: 
Select and explain. 
A. Coloboma of choroid, B. Coloboma of optic disc, C. Retinopathy of prematurity, D. Retinoblastoma
B: Coloboma of optic disc
Answer: B: Coloboma of optic disc 
Explanation: Ans. Coloboma of optic disc