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
[{'content': '3rd Ventricle develops from \nSelect and explain. \nA. Diencephalon, B. Telencephalon, C. Mesencephalon, D. Prosencephalon', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Inderbir Singh&;sHuman embryologyTenth editionPg 335The cavity of diencephalon forms the third ventricle', 'role': 'assistant'}]