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
Intracavitary electrocardiography is a diagnostic aid in- 
Select and explain. 
A. Tricuspid regurgitation, B. Endocardial fibroelastosis, C. Endomyocardial fibrosis, D. Ebstein's anomaly of the tricuspid valve
D: Ebstein's anomaly of the tricuspid valve
Answer: D: Ebstein's anomaly of the tricuspid valve 
Explanation: Ans. is 'd' i.e., Ebstein's anomaly of tricuspid valve Four chambered view in two dimension echocardiogram is diagnostic as it outlines the displaced tricuspid valve.