This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pathology
Most common tumor of head which undergoes calcification is 
Select and explain. 
A. Ependymoma, B. Medulloblastoma, C. Oligodendroglioma, D. Glioblastoma muliformae
C: Oligodendroglioma
Answer: C: Oligodendroglioma 
Explanation: The morphology of Oligodendrogliomas can be described as : well circumscribed, gelatinous,gray masses, often with cysts , focal hemorrhage and calcification. Calcifiction, present in as 90% of these tumors , ranges from microscopic foci to massive depositons. Ref: Robbins and cotrans 9e Pg: 1310 Img ref: