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': 'Which of the following is true regrading spinal cord and neuraxial blockade \nSelect and explain. \nA. Spinal cord ends at S1 in adults, B. Spinal anaesthesia is given below L3 level in children, C. Dural sac extends upto S2 in children, D. Spinal cord ends at lower border of L1 in children', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Spinal cord ends at upper border of L3 in children , and at lower border of L1 in adults. The dural sac extends upto S3 in children and S2 in adults.', 'role': 'assistant'}]