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
Which of the following arteries does not supply the circle of Willis? 
Select and explain. 
A. Anterior cerebral, B. Middle cerebral, C. Posterior-inferior cerebral, D. Posterior communicating
C: Posterior-inferior cerebral
Answer: C: Posterior-inferior cerebral 
Explanation: None