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': 'Hemochromatosis is a defect in metabolism of ? \nSelect and explain. \nA. Iron, B. Copper, C. Magnesium, D. Calcium', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is `a' i.e., Irono Hemochromatosis is characterized by the excessive accumulation of body iron, most of which is deposited in parenchymal organs such as the liver and pancreas.", 'role': 'assistant'}]