<prompt> Most common site for berry aneurysm ruptureAnterior circulation of braiPosterior circulation of brainAscending aoaDescending aoa  <response>: Ans. is a i.e., Anterior circulation of brain The most common sites in descending order of frequency are - Li Proximal poion of anterior communicating aery at the junction of anterior communicating aery with cerebral aery At the origin of the posterior communicating aery from the stem of the internal carotid aery. At the first major bifurcation of middle cerebral aery. At the bifurcation of internal carotid into middle and anterior cerebral aeries. Veibrobasilar bifurcation 3 