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': '"Millary shadow" on chest X-ray is seen in \nSelect and explain. \nA. Tuberculosis, B. Rheumatoid Ahritis, C. Pneumoconiosis, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A i.e. T.B; B i.e. R.A; C i.e. Pneumoconiosis', 'role': 'assistant'}]