This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Introduction to Central Nervous System, Subject name: Physiology
Which of the following foramina allows cerebrospinal fluid to pass directly from the ventricular system into the subarachnoid space? 
Select and explain. 
A. Foramen of Magendie, B. Aqueduct of Sylvius, C. Third ventricle, D. Lateral ventricle
A: Foramen of Magendie
Answer: A: Foramen of Magendie 
Explanation: The foramen of Magendie and the two lateral foramina of Luschka form the communication channels between the ventricular system within the brain and the subarachnoid space that lies outside the brain and spinal cord.