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
A child age 5 years, presents with loss of vision and mild proptosis of left eye . On examination direct is absent but consensual is present in left eye. He is having: 
Select and explain. 
A. Optic nerve glioma, B. Optic sheath meningioma, C. Retinoblastoma, D. Optic disc angioma
A: Optic nerve glioma
Answer: A: Optic nerve glioma 
Explanation: A i.e. Optic nerve glioma