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
[{'content': 'Trapezius muscle is attached to all structures EXCEPT \nSelect and explain. \nA. First rib, B. Clavicle, C. Scapula, D. Occiput', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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.', 'role': 'assistant'}]