This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Medicine
[{'content': 'What is seen in pulmonary hemosiderosis? \nSelect and explain. \nA. Hypoxemia, B. Hypercarbia, C. Hyperplasia of type II pneumocytes, D. All', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Pulmonary hemosiderosis (PH) is characterized by repeated episodes of intra-alveolar bleeding that lead to abnormal accumulation of iron as hemosiderin in alveolar macrophages and subsequent development of pulmonary fibrosis and severe anemia resulting bin hypothermia like condition Idiopathic pulmonary hemosiderosis is a rare disease characterized by repeated episodes of bleeding into the lungs, which can cause anemia and lung disease. The body is able to remove most of the blood from the lungs, but a large amount of iron is left behind Ref Davidson 23rd edition pg 680', 'role': 'assistant'}]