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
Tree in bud sign on HRCT suggestive of 
Select and explain. 
A. Sarcoidosis, B. Miliary TB, C. Endobronchial spread in TB, D. All the above
C: Endobronchial spread in TB
Answer: C: Endobronchial spread in TB 
Explanation: Tree in bud sign - Endobronchial spread in TB.