This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Aneurysms, Subject name: Surgery
[{'content': 'The size beyond which the risk of rupture of an abdominal aneurysm significantly increases is greater than - \nSelect and explain. \nA. 5.5 cm, B. 6 cm, C. 6.5 cm, D. 7 cm', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 5.5 cm o Factor most closely associated with the risk of rupture of the abdominal aortic aneurysm is size of aneurysm (i.e. size > 5.5 cm)", 'role': 'assistant'}]