This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
In an asymptomatic abdominal aoa aneurysm, elective repair is indicated if the aneurysmal diameter is greater than 
Select and explain. 
A. 5.5 cm, B. 6.5 cm, C. 7.5 cm, D. 8.5 cm
A: 5.5 cm
Answer: A: 5.5 cm 
Explanation: An asymptomatic abdominal aoic aneurysm in an otherwise fit patient should be considered for repair if >55 mm in diameter (measured by ultrasonography). The annual incidence of rupture rises from 1% or less in aneurysms that are <55 mm in diameter to a significant level, perhaps as high as 25%, in those that are 70 mm in diameter.Ref: Bailey and love pg: 961