This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Which of the following vessels do not take pa in the Circle of Willis? 
Select and explain. 
A. Anterior cerebral, B. Middle cerebral, C. Posterior cerebral, D. Posterior communicating
B: Middle cerebral
Answer: B: Middle cerebral 
Explanation: The circle of Willis is composed of the following aeries: Anterior cerebral aery(left and right) Anterior communicating aery Internal carotid aery (left and right) Posterior cerebral aery(left and right) Posterior communicating aery (left and right) The middle cerebral aeries, supplying the brain, are not considered pa of the circle. Chaurasia head and Neck 6th edition Pg: 444