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: Medicine
All the following are features of alveolitis (interstitial lung disease) EXCEPT- 
Select and explain. 
A. Exertional dyspnea, B. Early productive cough, C. Digital clubbing, D. Coarse crepitations during inspiration
B: Early productive cough
Answer: B: Early productive cough 
Explanation: None