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
False about optic nerve glioma 
Select and explain. 
A. May be a part of von recklinghausen's disease, B. Unilateral axial proptosis, C. Most common primary orbital tumour among children, D. CT shows fusiform enlargement of optic nerve
C: Most common primary orbital tumour among children
Answer: C: Most common primary orbital tumour among children 
Explanation: M/c primary orbital tumour among children is Rhabdomyosarcoma.