This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Intra Ocular Tumour, Subject name: Ophthalmology
Most common eye ball tumour is 
Select and explain. 
A. Retinblastoma, B. Sarcoma, C. Medulloblastoma, D. Malignant
A: Retinblastoma
Answer: A: Retinblastoma 
Explanation: Ans. is 'a' ie Retinoblastoma Retinoblastoma is the most common primary malignant intraocular tumour of childhood and the second most common of all age groups.MC primary malignant intraocular tumour of adults - Choroid melanoma*