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
An adult hypertensive male presented with sudden onset severe headache and vomiting. n examination, there is marked neck rigidity and no focal neurological deficit was found. The symptoms are most likely d/t - 
Select and explain. 
A. Intracerebral parenchymal hemorrhage, B. Ischemic stroke, C. Meningitis, D. Subarachnoid hemorrhage
D: Subarachnoid hemorrhage
Answer: D: Subarachnoid hemorrhage 
Explanation: None