This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
Central nervous system develops from 
Select and explain. 
A. Endoderm, B. Ectoderm, C. Mesoderm, D. All 3 germ layers
B: Ectoderm
Answer: B: Ectoderm 
Explanation: CNS develops from Neuroectoderm.