<prompt> The most posterior structure seen in the root of the lung is?BronchusSuperior pulmonary veinInferior pulmonary veinPulmonary artery  <response>: Ans-AMnemonic is Atal Bihari Vajpayee ABVThe arrangement of pulmonary structures at the hila of the lungs - ABV:From Aabove to below: Aartery-Bronchus-vvein.The pulmonary artery is uppermost whereas, pulmonary vein is inferior most.This applies well to left lung...for right lung one additional bronchus goes above the artery and is called as ep-arterial bronchus.Hence, in the right lung, the uppermost structure in the hilum will be a bronchus.a. NOTE: There are 2 veins which are named anterior inferior according to their location at the hilum. Similar arrangement on both sidesBronchus bronchial arteries are always posterior-most structures at the hila of both lungs. 