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