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
[{'content': 'All the following aeries supply the Sternocleidomastoid except \nSelect and explain. \nA. Superior Thyroid aery, B. Posterior auricular aery, C. Occipital aery, D. Suprascapular aery', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Blood supply of Sternocleidomastoid Upper 1/3: Occipital aeryMiddle 1/3: Superior Thyroid aeryLower 1/3: Suprascapular aery from thyrocervical trunkReference: Chourasia; 6th edition; 89th page', 'role': 'assistant'}]