This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tumors of Nervous System, Subject name: Medicine
Most common site of sub ependymal astrocytoma 
Select and explain. 
A. Trigone of lateral ventricle, B. Foramen of Munro, C. Temporal horn of lateral ventricle, D. 4th ventricle
B: Foramen of Munro
Answer: B: Foramen of Munro 
Explanation: Ans. is 'b' i.e. Foramen of Munro Most common site of subependymal astrocytoma is Foramen of monro.