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: Radiology
[{'content': 'All the following show miliary shadows on chest X-ray except: \nSelect and explain. \nA. Pneumoconiosis, B. Mitral stenosis, C. Sarcoidosis, D. Staphylococcal pneumonia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. Staphylococcal pneumonia', 'role': 'assistant'}]