This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Acute coronary syndrome, Subject name: Medicine
[{'content': 'A 67-year-old man with a history of hypeension, hyperlipidemia and tobacco use has been diagnosed with infra-renal aoic aneurysm of size 3 X 3.5 cm. Which is best suited for this patient? \nSelect and explain. \nA. Endovascular stenting of an aneurysm, B. Serial follow up with MRI, major determinant of surgery being renal aery involvement, C. Serial follow up with MRI, initiate statins and major determinant of surgery being size greater than 5.5cm, D. Serial follow up with MRI, initiate Statins and operate only in case of acute anginal pain', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Indications for surgery of AAA Size of AAA exceeds >= 5.5cm Rapid expansion Onset of symptoms. Endovascular stent grafts for infra-renal AAA are achieving success in selected patients. Choice D is a close option but waiting for symptoms to appear would not a be logical step.', 'role': 'assistant'}]