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
Not an anti oxidant in Lens 
Select and explain. 
A. Vitamin A, B. Vitamin B, C. Vitamin C, D. Vitamin D
A: Vitamin A
Answer: A: Vitamin A 
Explanation: β Carotenoids (precursor of Vitamin A) is an anti oxident in Lens, not Vitamin A.