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 common tumour that spreads into the orbit from the intracranial cavity is: 
Select and explain. 
A. Astrocytoma, B. Pituitary adenoma, C. Sphenoid wing-meningioma, D. Neurofibroma
C: Sphenoid wing-meningioma
Answer: C: Sphenoid wing-meningioma 
Explanation: Ans. Sphenoid wing-meningioma