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
In atrial septal defect the aorta is – 
Select and explain. 
A. Small, B. Normal, C. Enlarged, D. Aneurysmal
A: Small
Answer: A: Small 
Explanation: Chest x-ray in ASD

Mild to moderate cardiomegaly                                            
Right atrial and right ventricular enlargement.                     
Plethoric lung fields.
prominent pulmonary artery segement.
Relatively small aortic shadow