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
Which of the following is malignant intraocular tumor of children: September 2010 
Select and explain. 
A. Retinoblastoma, B. Rhabdomyosarcoma, C. Melanoma, D. Chloroma
A: Retinoblastoma
Answer: A: Retinoblastoma 
Explanation: Ans. A: Retinoblastoma The most common primary malignant intraocular tumor in children is retinoblastoma. Neuroblastoma is the most common cause of orbital metastases in children. Rhabdomyosarcoma is the most common orbital tumour of children.