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: Medicine
Brain tumor causing hypernatremia in children 
Select and explain. 
A. Medulloblastoma, B. Cerebellar astrocytoma, C. Craniophyrangioma, D. Brain stem glioma
C: Craniophyrangioma
Answer: C: Craniophyrangioma 
Explanation: Ans. is 'c' i.e., Craniophyrangioma