<prompt> Which of the following is the most common site of aneurysmal subarachnoid hemorrhage?Anterior communicating aeryBasilar aeryPosterior communicating aeryMiddle cerebral aery  <response>: Berry aneurysms are most common in anterior circulatation. Overall MC site of aneurysmal SAH: Anterior communicating aery causing worst headache of life. If in the question mentioned 3rd nerve is involved and site was asked : PCA Post Communicating Aery ,would be the answer. 