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
A patient presented with thunder clap headache followed by unconsciousness with pregressive HI ranial nerve palsy. Likely diagnosis is - 
Select and explain. 
A. Extradural hemorrhage, B. Aneurysmal subarachnoid hemorrhage, C. Basilar migraine, D. Cluster headache
B: Aneurysmal subarachnoid hemorrhage
Answer: B: Aneurysmal subarachnoid hemorrhage 
Explanation: None