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
[{'content': "A young patient presents to the ophthalmology clinic with loss of central vision. There is no obvious family history. ERG and EOG were observed to be normal which of the following is the most likely diagnosis. \nSelect and explain. \nA. Stargardt's disease, B. Best's Vitelliform Dystrophy, C. Retinitis Pigmentosa, D. Cone-Rod Dystrophy", 'role': 'user'}, {'content': "Answer: A \nExplanation: A i.e. Stargandt's disease", 'role': 'assistant'}]