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
[{'content': 'Vitamin that acts as reducing agent ? \nSelect and explain. \nA. Vitamin D, B. Vitamin B12, C. Vitamin B1, D. Vitamin C', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Vitamin C", 'role': 'assistant'}]