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