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: Unknown
[{'content': 'Lens develops from: \nSelect and explain. \nA. Surface ectoderm, B. Neuroectoderm, C. Mesoderm, D. Endoderm', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: a) (surface ectoderm) Ref: parson 20th ed p- 4Structures arising from various primodial layers:Neural ectoderm:Mesoderm:smooth muscle of the irisiris epitheliumciliary epitheliumretinaretinal pigment epitheliumfibres of the optic nervepart of vitreousextraocular musclescorneal stromasclerairischoroidspart of vitreousSurface ectoderm:conjunctival epitheliumcomeal epitheliumlacrimal glandstarsal glandslens', 'role': 'assistant'}]