This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
[{'content': 'All of the following are contents of sub-occipital triangle, except \nSelect and explain. \nA. Veebral aery, B. Dorsal ramus of C1 nerve, C. Suboccipital plexus of vein, D. Occipital aery', 'role': 'user'}, {'content': 'Answer: D \nExplanation: CONTENTS OF SUBOCCIPITAL TRIANGLE: Third pa of veebral aery Dorsal ramus of nerve C1-suboccipital nerve Suboccipital plexus of veins NOTES: SUBOCCIPITAL MUSCLES- Rectus capitis posterior major Rectus capitis posterior minor Obliquus capitis superior Obliquus capitis inferior Ref BDC volume 3,sixth edition pg 179', 'role': 'assistant'}]