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. On 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