This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
[{'content': 'When a horseshoe kidney develops, the ascent of the kidney is restricted by the: \nSelect and explain. \nA. Internal iliac artery, B. External iliac artery, C. Common iliac artery, D. Inferior mesenteric artery', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 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 mid\xadline vessel that is encountered by the horseshoe kidney is the inferior mesenteric artery. This artery prevents the kidney from continuing its ascent.', 'role': 'assistant'}]