<prompt> Most common site for berry aneurysm rupture?Anterior circulation of brainPosterior circulation of brainAscending aoaDesending aoa  <response>: Harrisons principles of internal medicine 17th edition. Approximately 85 aneurysms occur in anterior circulation mostly on circle of Willis. Those 7 mm in diameter and those at the top of basilar aery and at the origin of posterior communicating aery are at greater risk of rupture 