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
Sternocleidomastoid is supplied by all of the following aeries, EXCEPT: 
Select and explain. 
A. Occipital, B. Posterior auricular, C. Thyrocervical trunk, D. Superior thyroid
B: Posterior auricular
Answer: B: Posterior auricular 
Explanation: 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.