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
Myelin forming cells in cns 
Select and explain. 
A. Oligodendrocytes, B. Schwancells, C. Both, D. None
A: Oligodendrocytes
Answer: A: Oligodendrocytes 
Explanation: Oligodendrocytes are the myelin forming cells of the cns One cell can myelinate 30 neurons Ref:Guyton and Hall textbook of medical physiology 12th edition,page number:72,73