When a horseshoe kidney develops, the ascent of the kidney is restricted by the:
Internal iliac artery
External iliac artery
Common iliac artery
Inferior mesenteric artery
A horseshoe kidney develops when the inferior poles of the two kidneys fuse together as they ascend into the abdomen from the pelvis. The first anterior mid­line vessel that is encountered by the horseshoe kidney is the inferior mesenteric artery. This artery prevents the kidney from continuing its ascent.