Posterior communicating aery connects
Posterior communicating aery connects the internal carotid aery with posterior cerebral aery.(Ref: Vishram Singh textbook of clinical neuroanatomy second edition pg 172)
Two posterior cerebral aeries
Posterior cerebral aery with middle cerebral aery
Posterior cerebral aery with internal carotid aery
Anterior cerebral aery with middle cerebral aery
Brain 