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: Biochemistry
Which of the following is not an antioxidant 
Select and explain. 
A. Beta carotene, B. Vit C, C. Vit E, D. Vit B1
D: Vit B1
Answer: D: Vit B1 
Explanation: Antioxidant vitamins are beta carotene, vitamin A, vitamin C and vitamin E.