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: Anatomy
[{'content': 'Subarachnoid space ends at - \nSelect and explain. \nA. D12, B. L2, C. L5, D. S2', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The dura and arachnoid along with subarachoid space containing CSF extend upto 2nd sacral vertebra.', 'role': 'assistant'}]