Which of the following are unpaired vessel in CNS?: (A) Anterior-cerebral aery, (B) Basilar aery, (C) Posterior- Cerebellar aery, (D) Posterior-communicating aery
Answer is B. Basilar aery is single unpaired vessel, formed by right &left veebral aeries at lower border of pons, Ref: Gray's40e/p-262