This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous system, Subject name: Physiology
The vanity of mesencephalic brain vesicle is 
Select and explain. 
A. Lateral ventricle, B. Third ventricle, C. Fouh ventricle, D. Cerebral aqueduct
D: Cerebral aqueduct
Answer: D: Cerebral aqueduct 
Explanation: The cerebral aqueduct, (aqueductus mesencephali, mesencephalic duct, syln aqueduct, or aqueduct of Sylvius), is within the midbrain. It contains cerebrospinal fluid (CSF), and connects the third ventricle to the fouh ventricle, located dorsal to the pons and ventral to the cerebellum Ref: guyton and hall textbook of medical physiology 12 edition page number: 841,842,843