This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen and pelvis, Subject name: Anatomy
The subarachnoid space ends at 
Select and explain. 
A. L1, B. L2, C. L5, D. S2
D: S2
Answer: D: S2 
Explanation: Arachnoid & dural sheath end at the lower end of the S-2 veebra. Subarachnoid space terminates at the caudal (lower border) S-2 veebra. This is also the ending of the sub-dural space. Ref - BDC 6thedition vol 2