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: Anaesthesia
Spinal anaesthesia should be injected into the space between – 
Select and explain. 
A. T12 – L1, B. L1 – L2, C. L3 – L4, D. L5 – S1
C: L3 – L4
Answer: C: L3 – L4 
Explanation: L2-3 or L3-4 intervertebral space is used in adult as adult spinal cord ends at lower border of L1 vertebrae.
L4-5 intervertebral space is used in children as spinal cord ends at lower border of L3 vertebrae in children.