This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
[{'content': 'Retina is pa of ? \nSelect and explain. \nA. CNS, B. PNA, C. ANS, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Retina is a pa of CNS and develops from Neuroectoderm.', 'role': 'assistant'}]