This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Sternocleidomastoid is supplied by all of the following aeries except \nSelect and explain. \nA. Occipital, B. Posterior auricular, C. Thyrocervical trunk, D. Superior thyroid', 'role': 'user'}, {'content': "Answer: C \nExplanation: Superior thyroid aery is a branch of ECA, inferior thyroid aery is a branch of thyrocervical trunk of subclan aery Ref: Gray's40e/262", 'role': 'assistant'}]