This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, 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: B \nExplanation: The sternocleidomastoid muscle derives its blood supply from three separate sources: Superior-occipital aeryCentral-superior thyroid aeryInferior- thyrocervical trunkRef: Gray's anatomy: the anatomical basis of clinical practice by Henry Gray, Susan Standring, Harold Ellis, 2005, Page 536.", 'role': 'assistant'}]