This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Anatomy
Which of glial cell is mesodermal in origin - 
Select and explain. 
A. Macroglial cells, B. Microglial cells, C. Oligodendrocytes, D. Ependymal cells
B: Microglial cells
Answer: B: Microglial cells 
Explanation: Ans. is 'b' i.e., Microglial cellso Microglial cells are derived from mesenchymal (mesodermal) cells.Development of cells in CNSCells of originDeveloped mature cellsNeuroepithelial cellso Neuronso Glial cells (Macroglial cells)# Oligodendrocytes# Astrocytes# Ependymal cellsMesenchymal (mesodermal) cellso Microglial cells