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
The differential diagnosis of retinoblastoma would include all except. 
Select and explain. 
A. Persistent hyperplastic primary vitreous, B. Coat's disease., C. Retinal astrocytoma, D. Retinal detachment
D: Retinal detachment
Answer: D: Retinal detachment 
Explanation: D i.e. Retinal Detachment Retinal detachment would never be included in differential diagnosis of retinoblastomaQ as their age of presentation is quiet different.