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: Unknown
[{'content': 'Spinal Anesthesia should be injected into the space between: \nSelect and explain. \nA. T12–L1, B. L3–L4, C. L1– L2, D. L5–S1', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The LA is injected in the sub arachnoid space between L2-L3 or L3-L4.\n\xa0\nSpinal cord extends from medulla oblongata to lower border of L, in adult.\n\xa0\nSpinal; cord extends from medulla oblongata to lower border of L3 in infant & neonate., (adult level achieved at 2 years of age)\n\xa0\nIn infancy spinal; anesthesia given at L4-L5. Level\n\xa0\nIn adult spinal anaesthesia given at L3-L4 OR L4rL5 space, (even at L2~L3)\n\xa0\nIn. adult usually spinal anesthesia given at l3-l4 level Remember structures encountered during spinal anesthesia\n\xa0\n1-skin, 2-subcutaneous tissue, 3-supraspinous ligament, 4-lnterspinous ligament, 5-ltgament flavum, 6-dura, 7-arachnoid.', 'role': 'assistant'}]