This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: CNS Tumors, Subject name: Surgery
Most common site of primary spinal tumor 
Select and explain. 
A. Intramedullary; Extradural, B. Intramedullary only, C. Intradural; Extramedullary, D. Intra axially only
C: Intradural; Extramedullary
Answer: C: Intradural; Extramedullary 
Explanation: - MC spinal tumor - Metastasis - MC primary spinal tumor - Nerve sheath tumor - MC intra - Medullary tumor - Astrocytoma - MC site of primary spinal tumor - Intra-dural; Extra medullary