Veebral aeries of both sides unite to form: (A) Anterior spinal aery, (B) Posterior spinal aery, (C) Medullary aery, (D) Basilar aery
Answer is D. Veebral aery curves round the ventrolateral aspect of the medulla obolongata between the root of hypoglossal nerve unite with its fellow at lower border of pons to form median basilar aery Bd chaurasias Human anatomy Volume 3 Sixth edition