<prompt> The last tributary of the azygos vein is -Right superior intercostal veinHemi-azygos veinRight bronchial veinAccessory azygos vein  <response>: Tributaries of Azygos veinRight superior intercostal veinRight posterior intercostal veins 5 to 11Hemiazygos veinAccessory hemiazygos veinRight bronchial vein- last tributary that joins Azygos vein just before its termination.Esophageal, mediastinal and pericardial veins. 