This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: vitamins, Subject name: Biochemistry
[{'content': 'Which of the following Vitamin is an antioxidant? \nSelect and explain. \nA. Vitamin D, B. Vitamin E, C. Vitamin K, D. Vitamin B1', 'role': 'user'}, {'content': 'Answer: B \nExplanation: VitE is an anti-oxidant. The E vitamins consist of eight naturally occurring tocopherols, of which a-tocopherolis the most active (Figure 28.28). The primary function of vitamin E is as an antioxidant in prevention of the nonenzymic oxidation of cell components, for example, polyunsaturated fatty acids, by molecular oxygen and free radicals. Reference: Lippincott Textbook of Biochemistry pg no. 391', 'role': 'assistant'}]