This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Anatomy
[{'content': 'Ventricles are lined by? \nSelect and explain. \nA. Oligodendrocytes, B. Ependymal cells, C. Schwann cells, D. Astrocytes', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ventricles are lined by Ependymal cells. The ependymal cells play an impoant role in the production and regulation of CSF.', 'role': 'assistant'}]