This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Surgery
A female presented with the severe headache of sudden onset. On CT scan a diagnosis of subarachnoid haemorrhage is made. The most common site of subarachnoid haemorrhage is - 
Select and explain. 
A. Middle meningeal aery, B. Berry aneurysm rupture, C. Basilar aery, D. Subdural venous sinuses
B: Berry aneurysm rupture
Answer: B: Berry aneurysm rupture 
Explanation: Excluding head trauma the most common cause of SAH is rupture of a saccular aneurysm (Berry aneurysm or congenital aneurysm)." Ref : Harrison, 17/e p1726