This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Surgery
A 45-years old hypertensive male presented with sudden onset most severe headache, vomiting and neck stiffness. On examination he didn't have any focal neurological deficit. His CT scan shoed blood in the Sylvain fissure. The probable diagnosis is: 
Select and explain. 
A. Meningitis, B. Ruptured aneurysm, C. Hypertensive bleed, D. Stroke
B: Ruptured aneurysm
Answer: B: Ruptured aneurysm 
Explanation: Ans. (b) Rupture aneurysm* No focal neurological deficit* Sudden excruciating headache (Thunderclap headache)* Neck Stiffness* Blood in Sylvian fissureThese are the features of Berry aneurysm rupture.