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': 'Optic cup is derived from ? \nSelect and explain. \nA. Neural ectoderm, B. Surface ectoderm, C. Mesoderm, D. Neural crest', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Neural ectoderm", 'role': 'assistant'}]