This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Spinal, Epidural, & Caudal Blocks, Subject name: Anaesthesia
[{'content': 'The given instrument is used for? \nSelect and explain. \nA. Pleural biopsy, B. Lumbar puncture, C. Liver biopsy, D. Bone marrow biopsy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. Lumbar puncture (Ref: Harrison 19/e p443e-1, 18/e p46) The given needle in the question is used for lumbar puncture.Abrams Pleural Biopsy NeedleVim-Silverman Liver Biopsy NeedleLumbar Puncture Needle', 'role': 'assistant'}]