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
MC intraocular malignant tumour of childhood: March 2013 
Select and explain. 
A. Malignant melanoma, B. Retinoblastoma, C. Basal cell carcinoma, D. Naevus of iris
B: Retinoblastoma
Answer: B: Retinoblastoma 
Explanation: Ans. B i.e. Retinoblastoma