This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cranial cavity, Subject name: Anatomy
[{'content': 'Which of the following passes through the foramen magnum? \nSelect and explain. \nA. Veebral aery, B. XII cranial nerve, C. Cranial pa XIth nerve, D. Internal carotid aery', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Foramen magnum transmits Lower end of medulla Anterior spinal aery Posterior spinal aery 4th pa of veebral aery Spinal pa of XIth nerve Other structures: Apical ligament and tip of dens, membrana tectoria, veical band of Cruciate Ligament.', 'role': 'assistant'}]