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
A young patient present with significant loss of central vision and a normal ERG. There is no obvious family history of similar presentation. The most likely diagnosis: 
Select and explain. 
A. Best's disease, B. Stargardt's disease, C. Retinitis pigmentosa, D. Cone-rod dystrophy
B: Stargardt's disease
Answer: B: Stargardt's disease 
Explanation: Ans. Stargardt's disease