<prompt> A female presented with severe headache of sudden onset. On CT scan a diagnosis of subarachnoid heamorrhage is made. The most common site of subarachnoid haemorrhage is -Middle meningeal aeryBerry aneurysm ruptureBasilar aerySubdural venous sinuses  <response>: Ans. is b ie. Berry Aneurysm rupture Excluding head trauma the most common cause of SAH is rupture of a saccular aneurysm Berry aneurysm or congenital aneurysm. 