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
[{'content': 'Ascent of horse shoe shaped kidney is prevented by \nSelect and explain. \nA. Superior mesenteric aery, B. Inferior mesenteric aery, C. Superior mesenteric vein, D. Inferior mesenteric vein', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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.', 'role': 'assistant'}]