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': 'Size of needle required for FNAC: \nSelect and explain. \nA. 16 gauge needle, B. 18 gauge needle, C. 20 gauge needle, D. 24 gauge needle', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 22-26 gauge needle is required for FNAC', 'role': 'assistant'}]