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
The following ocular structure in not derived from surface ectoderm: 
Select and explain. 
A. Crystalline lens, B. Sclera, C. Corneal epithelium, D. Epithelium of lacrimal glands
B: Sclera
Answer: B: Sclera 
Explanation: B i.e. Sclera