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: Medicine
Pathological Features of Idiopathic pulmonary Hemosiderosis are all except 
Select and explain. 
A. Hyperplasia of type II alveolar pneumocytes, B. Alveolar capillary dilatation, C. Diffuse alveolar proteinosis, D. Hemosiderin laden macrophages
C: Diffuse alveolar proteinosis
Answer: C: Diffuse alveolar proteinosis 
Explanation: Idiopathic pulmonary Hemosiderosis is characterized by diffuse alveolar hemorrhage.