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
The most commonly seen primary orbital tumour in children is: 
Select and explain. 
A. Rhabdomyosarcoma, B. Glioma of optic nerve, C. Optic nerve sheath meningioma, D. Retinoblastoma
A: Rhabdomyosarcoma
Answer: A: Rhabdomyosarcoma 
Explanation: Ans. Rhabdomyosarcoma