This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney and ureter, Subject name: Surgery
Horseshoe kidney ascent is prevented by: 
Select and explain. 
A. Superior mesenteric aery, B. Superior mesenteric vein, C. Inferior mesenteric aery, D. Inferior mesenteric vein
C: Inferior mesenteric aery
Answer: C: Inferior mesenteric aery 
Explanation: Ascent of horseshoe kidney remains incomplete due to Inferior Mesentric Aery prevents fuher migration of kidney . Isthmus usually located adjacent to L3-L4 veebrae , just below the origin of IMA from abdominal aoa .