This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': 'True about subarachnoid space \nSelect and explain. \nA. Surround the conus, B. Outside subdural space, C. Between piamater and brain, D. Between dura and subarachnoid', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Subarachnoid space ends at S2 level while spinal cord ends at L1. Thus it surrounds the conus completely', 'role': 'assistant'}]