This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and breast, Subject name: Surgery
[{'content': 'Sentinel lymph node biopsy in carcinoma breast is done if \nSelect and explain. \nA. LN palpable, B. Breast mass but no lymph node palpable, C. Breast lump with palpable axillary node, D. Metastic CA breast', 'role': 'user'}, {'content': "Answer: B \nExplanation: Sentinel lymph node is the first axillary lymph node draining the breast. SLNB is done in all cases of early breast cancers ,T1 and T2 without clinically palpable nodes. It is not done in clinically palpable axillary nodes as tgere is already distoion of lymphatic flow due to tumour. SRB's Manual of Surgery.Edition -5. Pg no:543", 'role': 'assistant'}]