This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S., Subject name: Pediatrics
Causes of wide fixed splitting of second heart sound include all except: 
Select and explain. 
A. Atrial septal defect, B. Ebstein anomaly, C. Total anomalous pulmonary venous return, D. Right bundle branch block
B: Ebstein anomaly
Answer: B: Ebstein anomaly 
Explanation: b. Ebstein anomaly(Ref: Nelson's 20/e p 2190)Wide fixed splitting of second heart sound is seen in Atrial septal defect, Total anomalous pulmonary venous return (TAPVC) and Right bundle branch block (RBBB)