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: Surgery
[{'content': "Which needle is used for pleural biopsy? \nSelect and explain. \nA. Vin Silvermann's, B. Abram' s, C. Abraham's, D. Osgood' s", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Abram's", 'role': 'assistant'}]