This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cerebrovascular Diseases, Subject name: Surgery
The most common site of Berry aneurysm is: 
Select and explain. 
A. Junction of anterior communication aery with anterior cerebral aery, B. Junction of posterior communicating aery with internal carotid aery, C. Bifurcation of middle cerebral aery, D. Veebral aery
A: Junction of anterior communication aery with anterior cerebral aery
Answer: A: Junction of anterior communication aery with anterior cerebral aery 
Explanation: Occurence of Berry aneurysm in order of frequency Anterior communicating aery anterior cerebral junction (29%) Posterior communicating aery internal carotid junction (28%) Middle cerebral bifurcation (18%) Intracranial carotid bifurcation (8%) Veebrobasilar or basilar bifurcation (3%)