This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper limb bones and muscles (proximal region) & Scapular movements, Subject name: Anatomy
Trapezius muscle is attached to all structures EXCEPT 
Select and explain. 
A. First rib, B. Clavicle, C. Scapula, D. Occiput
A: First rib
Answer: A: First rib 
Explanation: Trapezius is a upper back muscle triangular in shape. Origin- Occipital bone Cervical spine Thoracic spine Inseion- Clavicle (lateral 1/3rd) Acromian process of scapula Spine of scapula Supplied by Spinal acessory nerve. Action - pulls the shoulder upwards.