This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
[{'content': 'Which of the following features on X-ray chest can differentiate an Atrial septal Defect (ADH) from a Ventricular Septal Defect (VSD) \nSelect and explain. \nA. Enlarged Left Atrium, B. Pulmonary Plethora, C. Enlarged pulmonary Aery, D. Enlarged Aoa', 'role': 'user'}, {'content': "Answer: A \nExplanation: 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 LV+LA +RV Enlargement (Mild/moderate cardiomegaly) (Gross caiomegaly) Pulmonary Aery Enlarged Enlarged Enalrged Pulmonary Present Present Present Vasculature (Pulmonary Plethora) Aoa Normal (or small) Normal (or small) Enlarged", 'role': 'assistant'}]