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
Smoking is generally not associated as a risk factor with: 
Select and explain. 
A. Small celI carcinorna, B. Respiratory bronchiolitis, C. Emphysema, D. Bronchiectasis
B: Respiratory bronchiolitis
Answer: B: Respiratory bronchiolitis 
Explanation: Respiratory Bronchiolitis is usually rare complication compared to the other conditions associated with smoking. All other conditions mentioned above are associated with smoking. Ref: Harrison's Principles of Internal Medicine, 16th Edition, Page 1495; R Alagappan, Manual of Practical Medicine, 3rd Edition, Pages 720-21.