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: Pathology
[{'content': 'Commonly used FNAC needle gauge ? \nSelect and explain. \nA. 26-29, B. 22-26, C. 18-22, D. 16-18', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., 22-26", 'role': 'assistant'}]