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
Rees-Elswoh classification is used for: 
Select and explain. 
A. BCC eyelid, B. Melanoma of choroid, C. Retinoblastoma, D. Hepatoblastoma
C: Retinoblastoma
Answer: C: Retinoblastoma 
Explanation: Retinoblastoma