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
Cavity of mesencephalon 
Select and explain. 
A. Lateral ventricle, B. Fouh ventricle, C. Cerebral acqueduct, D. Third ventricle
C: Cerebral acqueduct
Answer: C: Cerebral acqueduct 
Explanation: The cavity of mesencephalon forms the cerebral aqueduct.The cavity of Rhombencephalon forms the fouh ventricle.The cavity of prosencephalon forms lateral and third ventricle.(Ref: Vishram Singh textbook of clinical neuroanatomy second edition pg 4)