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 arteries except? \nSelect and explain. \nA. Occipital, B. Posterior auricular, C. Thyrocervical trunk, D. Superior thyroid', 'role': 'user'}, {'content': "Answer: C \nExplanation: Sternocleidomastoid muscle receives its blood supply from branches of occipital and posterior auricular arteries (upper part of muscle), the superior thyroid artery or branches of the external carotid artery (middle part of muscle) and the suprascapular artery (lower part of muscle) — Gray's - 441\nAlthough the suprascapular artery is a branch of thyrocervical trunk, it seems to be the most appropriate answer as all other options directly supply the muscle.", 'role': 'assistant'}]