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