This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Regional anaesthesia, Subject name: Anaesthesia
Spinal anesthesia is given at which of the following levels 
Select and explain. 
A. L1-2, B. L2-4, C. Midline of thorax, D. Below L5
B: L2-4
Answer: B: L2-4 
Explanation: Spinal anesthesia is usually injected at L2-L3, L3-L4