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: Forensic Medicine
Circle of Willis is not formed by: TN 11 
Select and explain. 
A. Anterior choroidal aery, B. Anterior cerebral aery, C. Posterior cerebral aery, D. Anterior communicating aery
A: Anterior choroidal aery
Answer: A: Anterior choroidal aery 
Explanation: Ans. Anterior choroidal aery