During the Preparation for a Catheter-Based Radiofrequency Ablation of the Atrioventricular

During the preparation for a catheter-based radiofrequency ablation of the atrioventricular node, one of your medical students asked where we should place the catheter tip to ablate the AV-node, your answer should be?

A) Midway between the inferior van cava opening and the tricuspid valve.
B) In the left Atrium near the orifices of the pulmonary veins.
C) In the interatrial septum close to the coronary sinus
D) Near the orifice of the superior vena cava.
E) In the interventricular septum, close to the tricuspid valve.