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': 'The vitamin that facilitates iron absorption: \nSelect and explain. \nA. Folic acid, B. Ascorbic acid, C. Biotin, D. Para amino benzoic acid', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]