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: Medicine
Most common cause of spontaneous sub-arachnoid haemorrhage is - 
Select and explain. 
A. Trauma, B. Hypertension, C. Berry aneurysm rupture, D. Raised intracranial tension
C: Berry aneurysm rupture
Answer: C: Berry aneurysm rupture 
Explanation: None