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
[{'content': 'Spinal anesthesia is given at which of the following levels – \nSelect and explain. \nA. L1–2, B. L2–4, C. Midline of thorax, D. Below L5 (caudal)', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Spinal anesthesia involves the injection of a local anesthetic into the cerebrospinal fluid found in the subarachnoid space, usually below the level of L2\nSpinal cord in adults ends at the level of L2 (lower border of L1) & upto L3 in children. To avoid potential needle trauma to spinal cord, lumbar puncture is usually not performed above L2 in adult and above L3 in children.', 'role': 'assistant'}]