This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular Radiology, Subject name: Radiology
Plethoric lung fields are seen in all of the following conditions, except: 
Select and explain. 
A. Atrial septal defect (ASD), B. TAPVC (Total Anomalous Pulmonary venous connection), C. Ebstein's' anomaly, D. Ventricular septal defect
C: Ebstein's' anomaly
Answer: C: Ebstein's' anomaly 
Explanation: Ebsteins' anomaly : Plethoric lung fields are seen in conditions which increase pulmonary blood flow. They are: Left to right shunt - ASD, VSD, PDA, Coronary aery fistula into right hea, Aoopulmonary window Transposition of great aeries with ASD or VSD Truncus aeriosus Total anomalous pulmonary venous connection