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: Medicine
‘Himalayan P waves’ in ECG is characteristic of: 
Select and explain. 
A. Atrial septal defect, B. Eisenmenger syndrome, C. Tetralogy of Fallot, D. Ebstein’s anomaly
D: Ebstein’s anomaly
Answer: D: Ebstein’s anomaly 
Explanation: 12 – lead ECG

Rarely normal
Abnormal P waves consistent with right atrial enlargement – ‘Himalaya P waves”.
RBBB in 75-92%
PR prolongation is common due to RA enlargment
Ventricular pre-excitation 10-30%