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
[{'content': 'True regarding lens of eye \nSelect and explain. \nA. Ectoderm of origin, B. Avascular, C. Epithelium is single layer, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 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', 'role': 'assistant'}]