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': 'Tree in bud sign on HRCT suggestive of \nSelect and explain. \nA. Sarcoidosis, B. Miliary TB, C. Endobronchial spread in TB, D. All the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Tree in bud sign - Endobronchial spread in TB.', 'role': 'assistant'}]