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: Ophthalmology
[{'content': 'The lens is derived from - \nSelect and explain. \nA. Surface Ectoderm, B. Endoderm, C. Mesoderm, D. Neuroectoderm', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]