This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diseases of orbit, Lids and lacrimal apparatus, Subject name: Ophthalmology
A 23 year old child presented with leucocorea in the right time since 2 months. on examination, a total retinal detachment was present in the same eye. Ultrasound b-scan revealed a heterogeneous subretinal mass with calcification associated with retinal detachment the most likely clinical diagnosis 
Select and explain. 
A. Coats disease, B. Retinoblastoma, C. Toxacariasis, D. Retinal tuberculoma
B: Retinoblastoma
Answer: B: Retinoblastoma 
Explanation: It indicates an epileptic Retinoblastoma where there is exudative retinal detachment Refer khurana 6/e 303