This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
3rd Ventricle develops from 
Select and explain. 
A. Diencephalon, B. Telencephalon, C. Mesencephalon, D. Prosencephalon
A: Diencephalon
Answer: A: Diencephalon 
Explanation: Inderbir Singh&;sHuman embryologyTenth editionPg 335The cavity of diencephalon forms the third ventricle