This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infectious Lung Disease: Pneumonia, Subject name: Pathology
[{'content': 'Masson bodies are seen in: \nSelect and explain. \nA. Usual interstitial pneumonia, B. Non-specific interstitial pneumonia, C. Cryptogenic Organizing Pneumonia, D. Hyaline membrane disease', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Masson bodies is characterized by involvement of alveolar space. Alveolar space & bronchioles have collection of Fibroblast. It is seen in patient with Cryptogenic Organizing Pneumonia. Cryptogenic organizing pneumonia aka bronchiolitis obliterans organizing pneumonia. Usual interstitial pneumonia - associated with Idiopathic pulmonary fibrosis .', 'role': 'assistant'}]