This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast Cancer - Types and Staging, Subject name: Surgery
[{'content': 'Intraoperative sentinel lymph node detection in axilla is done by using - \nSelect and explain. \nA. Mammography, B. Isosulfan blue dye, C. MRI *, D. CT', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Isosulfan blue dye o Lymphetic mapping is performed by using isosulfan blue dye, technetium-fabled sulfur colloid ablumin or a combination of both.", 'role': 'assistant'}]