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
Most common site of sub ependymal astrocytoma (giant cell) - 
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: None