<prompt> Which of the following features on X-ray chest can differentiate an Atrial septal Defect ADH from a Ventricular Septal Defect VSDEnlarged Left AtriumPulmonary PlethoraEnlarged pulmonary AeryEnlarged Aoa  <response>: Ans is a i.e., Enlarged Left Atrium o Left atrium is not enlarged in an ASD in contrast to VSD where the left atrium is typically enlarged. Features ASD VSD PDA Chamber RA RV LA LV RV LVLA RV Enlargement Mildmoderate cardiomegaly Gross caiomegaly Pulmonary Aery Enlarged Enlarged Enalrged Pulmonary Present Present Present Vasculature Pulmonary Plethora Aoa Normal or small Normal or small Enlarged 