<prompt> The size beyond which the risk of rupture of an abdominal aneurysm significantly increases is greater than -5.5 cm6 cm6.5 cm7 cm  <response>: 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 