Medicine True about co-arctation of aoa : A Most common site is distal to the origin of the left subclan aery B Most common age of presentation is at 15- 20years C Superior rib notching is due to erosion by dilated collateral vessels D Right ventricular hyperophy is prominent 💡 Explanation True about co-arctation of aoa : ✓ Correct Answer: A. Most common site is distal to the origin of the left subclan aery