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
[{'content': "A 45-year-old hypertensive male presented with sudden onset severe headache, vomiting and neck stiffness. On examination, he didn't have any focal neurological deficit. His CT scan showed blood in the Sylvain fissure. The probable diagnosis is - \nSelect and explain. \nA. Meningitis, B. Ruptured aneurysm, C. Hypertensive bleed, D. Stroke", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]