Those arteries go wherever they want - off the Aorta, common iliacs, wherever. Only 2 ureters tho
Can someone explain how to rule out the other answer choicers?
https://www.ncbi.nlm.nih.gov/pubmed/15599631 The horseshoe kidney was detected before surgery in 12 patients (80%) by ultrasonography, angiography, computed tomography (CT) or excretory urography. Angiography revealed multiple or anomalous renal arteries in 8 of 12 patients studied preoperatively
a good pic showing anomalous arteries in horseshoe kidney