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
Mesodermal in origin among the following is 
Select and explain. 
A. Astrocytes, B. Oligodendrocytes, C. Ependymal cells, D. Microglial cells
D: Microglial cells
Answer: D: Microglial cells 
Explanation: There is a third type of neuroglial cell called microglia. This type doesn't develop from the cells of the neural tube but migrates into it along with blood vessels. These cells are believed to be of mesodermal in origin HUMAN EMBRYOLOGY-INDERBIR SINGH TENTH EDITION-PAGE NO:116