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': 'Miliary mottling on chest radiograph can be seen in – \nSelect and explain. \nA. Pneumoconiosis, B. TB, C. Mitral stenosis, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]