This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Commonest type of intracranial tumor is 
Select and explain. 
A. Astrocytoma, B. Medulloblastoma, C. Meningioma, D. Secondaries
D: Secondaries
Answer: D: Secondaries 
Explanation: Reference 1315