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: Anatomy
The great vein of galen drains into the - 
Select and explain. 
A. Straight sinus, B. Inferior sagital sinus, C. IJV, D. EJV
A: Straight sinus
Answer: A: Straight sinus 
Explanation: Great cerebral vein of Galen drains into the straight sinus.