<prompt> Spinal anaesthesia should be injected into the space betweenT12 L1L1 L2L3 L4L5 S1  <response>: 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. 