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': "Which needle is shown below? \nSelect and explain. \nA. Vim silverman needle, B. Tru-Cut needle, C. Lumbar puncture needle, D. Abraham's pleural biopsy needle", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans.(B) Tru-cut needle.20mm sample notchScalpel-sharp surgical steel cutting edge retrieves cleanly cut, high-quality specimensRemovable stylet allows multiple sampling capabilitiesA thin-wall cannula for large core sampleCentimeter depth markings assist in needle placement', 'role': 'assistant'}]