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: Physiology
Retina is part of- 
Select and explain. 
A. CNS, B. PNS, C. ANS, D. None
A: CNS
Answer: A: CNS 
Explanation: Ans. is 'a' i.e., CNS * Retina is a part of CNS and develops along with CNS.* Retina develops from walls of optic cup. The outer thinner layer becomes retinal pigmented epithelium and inner thicker layer forms neural layer of retina.