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 following ocular structure is 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: Sclera is derived from mesoderm.\nCrystalline lens, corneal epithelium and lacrimal gland are derived from surface ectoderm.', 'role': 'assistant'}]