This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neck Triangles and parotid gland, Subject name: Anatomy
[{'content': 'All the following are contents of suboccipital triangle EXCEPT: \nSelect and explain. \nA. Veebral aery, B. Dorsal ramus of C1 nerve, C. Sub occipital plexus of vein, D. Occipital aery', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Contents of suboccipital triangle are : veebral aery (3rd pa), suboccipital nerve (dorsal ramus of C1) and suboccipital venous plexus. Occipital aery lies in occipital (not suboccipital) triangle. Suboccipital triangle is a muscular space situated deep on posterior aspect of the neck, below occipital bone, one on each side of the midline and bounded by four suboccipital muscles.', 'role': 'assistant'}]