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
Lower border of posterior belly of digastric is related to: 
Select and explain. 
A. Posterior auricular artery., B. Occipital artery., C. Palatine artery., D. Ascending pharyngeal artery.
B: Occipital artery.
Answer: B: Occipital artery. 
Explanation: It's upper border is related to posterior auricular artery.