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
Transport of Ascorbic acid to lens is done by: 
Select and explain. 
A. Myoinositol, B. Choline, C. Taurine, D. Na-K ATPase
D: Na-K ATPase
Answer: D: Na-K ATPase 
Explanation: Ans. (d) Na-K ATPaseRef: Vitamin C transport in human epithelial cells: evidence for presence of SVCT2; R kannan et alData suggests that ascorbic acid transport in lens epithelium is mediated by SVCT2 and not SVCT1