<prompt> Most common site of cerebral aneurysm is:Anterior communicating aeryPosterior communicating aeryMiddle cerebral aeryNone of the above  <response>: Prevalence of Cerebral Aneurysm by Location: Anterior circulation 85 30 Anterior communicating aery 25 Posterior communicating aery 20 Middle cerebral aery bifurcation 10 Other Posterior circulation 15 10 Basilar aery, most frequently at the basilar tip 5 Veebral aery, usually at the posterior inferior cerebellar aery Ref: Schwazs principle of surgery 9th edition, chapter 42. 