This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Brain , Subject name: Anatomy
Foramen of Magendie is the central opening of 
Select and explain. 
A. Lateral ventricle, B. 4th ventricle, C. 3rd ventricle, D. None
B: 4th ventricle
Answer: B: 4th ventricle 
Explanation: Foramen of magendie is an opening in the roof of 4th ventricle through which the cavity of ventricle communicates with the subarachnoid space of the cerebellomedullary cistern.(Ref: vishram Singh textbook of clinical neuroanatomy,2nd edition page 121)