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 is he investigation of choice to differentiate between benign and malignant thyroid nodule? \nSelect and explain. \nA. USG, B. FNAC, C. Scintigraphy, D. Biopsy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. FNACFNAC is the investigation of choice to differentiate between benign or malignant solitary thyroid nodules.', 'role': 'assistant'}]