<prompt> About emphysema True is?Frequently associated with obstructive sleep apneaDestruction and enlargement of the lung alveoliCentriacinar more prominent in lower lobesNot a component of COPD  <response>: B Destruction and enlargement of the lung alveoli EMPHYSEMA is characterized by destruction and enlargement of lung alveoli. Included in COPD. It includes centriacinar panacinar types. Centriacinar is most prominent in upper lobe superior segments of lower lobes. 