This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lens, Subject name: Ophthalmology
The crystalline lens derives its nourishment from- 
Select and explain. 
A. Blood vessels, B. Connective tissue, C. Aqueous and vitreous, D. Zonules
C: Aqueous and vitreous
Answer: C: Aqueous and vitreous 
Explanation: Major source of energy for lens is glucose which diffuses from aqueous (mainly) and vitreous into the lens. Ref: Anatomy & Physiology of the eye 2nd/e p.99.