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
Posterior communicating artery is a branch of: 
Select and explain. 
A. Middle cerebral artery, B. External carotid artery, C. Internal carotid artery, D. Ophthalmic artery
C: Internal carotid artery
Answer: C: Internal carotid artery 
Explanation: None