This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Orbit, Subject name: Anatomy
[{'content': 'Retina is part of - \nSelect and explain. \nA. CNS, B. PNA, C. ANS, D. None', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., CNS {Ref: I. B.Singh 8th/e p. 308]o Retina is a part of CNS and develops from Neuroectoderm.", 'role': 'assistant'}]