Least common site for berry aneurysm is -

Ans. is 'a' i.e., Veebral AeryBerry aneurysm The iiiher away the aneurysm from the anterior circulation or from the circle of willis , the less common will be its rate of occurance.o Berry aneurysm or Saccualr aneurysm or Congenital aneurysm is the most frequent type of intracranial aneurysm. o Most aneurysms occur in the anterior circulation and are found near the branchs points.o Most common site is junction between anterior cerebral aery and anterior communication aery (40%). o Next most common site is internal carotid aery and posterior communicating aery (20%) Less frequent sites include ?o Top of basilar aeryo Junction of basilar aery and the superior cerebllar aery or anterior inferior cerebellar aery.o Junction of veebral aery and posterior inferior cerebellar aery.