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
All the following are contents of suboccipital triangle EXCEPT: 
Select and explain. 
A. Veebral aery, B. Dorsal ramus of C1 nerve, C. Sub occipital plexus of vein, D. Occipital aery
D: Occipital aery
Answer: D: Occipital aery 
Explanation: 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.