This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ocular Embryology& Anatomy, Subject name: Ophthalmology
True regarding lens of eye 
Select and explain. 
A. Ectoderm of origin, B. Avascular, C. Epithelium is single layer, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: LENS Transparent , Biconvex & crystalline structure placed in patellar fossa Develop from the surface ectoderm Lens transparency is due to Avascularity of the lens Epithelium is single layering Lens capsule semipermeable in character