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: Pathology
[{'content': 'Iron absorption is decreased by A/E- \nSelect and explain. \nA. Calcium, B. Tetracycline, C. Phytate, D. Ascorbic acid', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Ascorbic acid", 'role': 'assistant'}]