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
True about subarachnoid space 
Select and explain. 
A. Surround the conus, B. Outside subdural space, C. Between piamater and brain, D. Between dura and subarachnoid
A: Surround the conus
Answer: A: Surround the conus 
Explanation: Subarachnoid space ends at S2 level while spinal cord ends at L1. Thus it surrounds the conus completely