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: Surgery
Commonest intramedullary spinal tumour is- 
Select and explain. 
A. Secondaries, B. Neurofibroma, C. Ependymoma, D. None of the above
C: Ependymoma
Answer: C: Ependymoma 
Explanation: None