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
[{'content': 'Diencephalon represents \nSelect and explain. \nA. Lateral ventricle, B. 3rd ventricle, C. 4th ventricle, D. Aquedct', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The diencephalon is the pa of brain between the cerebrum and brainstem.The cavity within it is called third ventricleThe pas of diencephalon are:ThalamusMetathalamusEpithalamusSubthalamusHypothalamus(Ref: Vishram Singh textbook of clinical neuroanatomy Second Edition pg -123)', 'role': 'assistant'}]