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: Radiology
Which of the following is the most common cause of a mixed cystic and solid suprasellar mass seen on cranial MR scan of a 10-year-old child? 
Select and explain. 
A. Pituitary adenoma, B. Craniopharyngioma, C. Optic chiasmal glioma, D. Germinoma
B: Craniopharyngioma
Answer: B: Craniopharyngioma 
Explanation: Ans. Craniopharyngioma