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
Calcification is pathognomonic feature of – 
Select and explain. 
A. Malignant melanoma of choroid, B. Retinocytoma, C. Retinoblastoma, D. Angiomatosis retinae
C: Retinoblastoma
Answer: C: Retinoblastoma 
Explanation: In retinoblastoma, there are areas of necrosis and calcification.