This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tumors, Subject name: Ophthalmology
[{'content': 'Most common intracranial tumour encroaching the orbit is \nSelect and explain. \nA. Astrocytoma, B. Glioblastoma multiforme, C. Sphenoid wing meningioma, D. Medulloblastoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The intracranial meningiomas which secondarily invade the orbit are arising from the sphenoid bone. Orbital invasion may occur through: floor of anterior cranial fossa, superior orbital fissure and optic canal. Ref khurana page no.423', 'role': 'assistant'}]