This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Veebral aeries of both sides unite to form \nSelect and explain. \nA. Anterior spinal aery, B. Posterior spinal aery, C. Medullary aery, D. Basilar aery', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 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', 'role': 'assistant'}]