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
Most common metastatic orbital tumour in children 
Select and explain. 
A. Neuroblastoma, B. Carcinoma lung, C. Ewing's sarcoma, D. Ovarian sarcoma
A: Neuroblastoma
Answer: A: Neuroblastoma 
Explanation: Metastatic orbital tumours in children neuroblastoma, nephroblastoma, Ewing's, testicular embryonal sarcoma and Ovarian sarcoma.