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: Surgery
[{'content': 'In the abdomen, aneurysms of the .... commonly occur next only to the aorta .... - \nSelect and explain. \nA. Internal iliac artery, B. External iliac artery, C. Splenic artery, D. Inferior mesentric artery', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]