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': 'The following ocular structure in not derived from surface ectoderm: \nSelect and explain. \nA. Crystalline lens, B. Sclera, C. Corneal epithelium, D. Epithelium of lacrimal glands', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Sclera', 'role': 'assistant'}]