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': 'Lower border of posterior belly of digastric is related to: \nSelect and explain. \nA. Posterior auricular artery., B. Occipital artery., C. Palatine artery., D. Ascending pharyngeal artery.', 'role': 'user'}, {'content': "Answer: B \nExplanation: It's upper border is related to posterior auricular artery.", 'role': 'assistant'}]