The correct option is A Ependymal cells
Ependymal cells are columnar cells that have ciliated surface. They support the central nervous system and also nutritive in function.
Microglia are minute cells, which are phagocytic pathogens and cellular debris within the brain.
Astrocytes form structural support between capillaries and neurons within the CNS and contribute to the blood-brain barrier.
Oligodendrocytes form myelin in CNS and guide the development of neurons within the CNS.