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': 'The procedure of choice for the evaluation of aoic aneurysm is - \nSelect and explain. \nA. Ultasonography, B. Computed tomography, C. Magnetic resonance imaging, D. Aeriography', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' i.e. Computed tomography "CT is the most precise test for imaging aoic aneurysm" - Sabiston \'As a preoperative scanning tool, CT scan is the gold standard. Angiography has largely been replaced by contrast CT scanning" - Schwaz', 'role': 'assistant'}]