This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vascular Disorders, Subject name: Ophthalmology
Cherry red spot is seen in - 
Select and explain. 
A. Niemann - Pick's disease, B. Tay Sach's disease, C. Central retinal artery occlusion, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. is 'd' i.e., All of the above Causes of cherry red spoto GM2 gangliosidoses (Tay sachs & sandhoff)o GM1 gangliosidoseso Niemann - Pick's diseaseo Gaucher's diseaseo Metachromatic leukodystrophyo Central retinal artery occlusion (CRAO)o Trauma (Berlin's edema / commotio retinae)o Quinine and Dapsoneo Farber's diseaseo Goldberg's diseaseo Hurler's syndromeo Cryoglobulinemiao Laber's congenital amaurosiso Sialidosis (galactosialidosis)o Mucopolysacharidosis VIIo Multiple sulfatase deficiencyo Poisoning Carbon mono-oxide, methanolo Shprintzen-Goldberg syndromeo Hallervorden spatz diseaseo Rarely in krabbe's disease