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
Crystalline lens is derived embryologically from the: 
Select and explain. 
A. Surface ectoderm, B. Neuroectoderm, C. Surface ectoderm and mesoderm, D. Neuroectoderm and mesoderm
A: Surface ectoderm
Answer: A: Surface ectoderm 
Explanation: Ans. Surface ectoderm