This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: GIT 1, Subject name: Anatomy
Ascent of horse shoe shaped kidney is prevented by 
Select and explain. 
A. Superior mesenteric aery, B. Inferior mesenteric aery, C. Superior mesenteric vein, D. Inferior mesenteric vein
B: Inferior mesenteric aery
Answer: B: Inferior mesenteric aery 
Explanation: Initialy in IUL(intrauterine life) kidneys are present in iliac fossa , Kidney has to reach the level of renal aery which is prevented by inferior mesenteric aery which is a branch of abdominal aoa. Fusion of right and left kidney occurs to form a U shaped structure at the level below inferior mesenteric aery.