This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuroanatomy, Subject name: Anatomy
[{'content': 'In CNS, myelin sheath of Neurons is formed by: \nSelect and explain. \nA. Astrocytes, B. Oligodendroglia cells, C. Schwann cells, D. All the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: ANSWER (B) Oligodendroglia cellsREF: Basic histology, Carlos & Jose, 11th edition, Chapter 9. Nerve Tissue 8c the Nervous SystemThe myelin sheath is produced by oligodendrocytes in the central nervous system and by Schwann cells in the peripheral nervous system.', 'role': 'assistant'}]