This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Embryology, Subject name: Anatomy
Astrocytes are seen to be developed from which layer? 
Select and explain. 
A. Mesoderm, B. Neuroectoderm, C. Endoderm, D. None
B: Neuroectoderm
Answer: B: Neuroectoderm 
Explanation: Ans. is 'b' i.e., Neuroectoderm Glial cells ofCNS1) Macroglia (derived from neuroectoderm) :- Astrocytes, oligodendrocytes, ependymal cells, schwann cells.2) Microglia (derivedfrom mesoderm).