This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Medicine
Lung volume reduction operations have been developed as a method of managing patients with 
Select and explain. 
A. Asbestosis, B. Emphysema, C. Bronchiectasis, D. Amyloidosis
B: Emphysema
Answer: B: Emphysema 
Explanation: In a patient with diffuse severe emphysema, resection or pa of the damaged lung may allow the patient's residual lung to function more efficiently. This technique may serve either as an alternative to lung transplantation or as a bridge until an appropriate donor organ is available. ref - Harrisons internal medicine 20e pg 1997