Answer is B (Prominent lower lobe vessels) : Chronic Cor Palmonale is associated with prominence of upper lobe and not lower lobe veins. Features of Congestive Cardiac Failure(CCF / CHF) include : 1. Enlarged cardiac silhouette / Cardiac shadow on chest X-rayQ 2. Ground glass appearance of pulmonary edema Q 3. 'Kerley B' linesQ 4. Prominence of upper lobe blood vessels Q (not lower lobe veins) 5. Pleural effusion, usually bilateral Q 'Kerley B' lines', also known as 'Septa' lines', represent dilated lymphatics and distended interlobular septa. They occur most commonly in pulmonary edema as a result of chronic pulmonary venous hypeension (in CCF). Kerley 'A' lines stand for Apex, 'B' for Base, and 'C' for Central region. B lines are most commonly seen Q.Infact they have a relation with left atrial pressure Q :They are invariably present if LA pressure goes above 20 mmHg. Q Small bilateral pleural effusions are frequently seen in acute LVF. Large effusion may be present in long standing cases of congestive hea failure.