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': 'Serum marker used after surgery for differentiated thyroid cancer is \nSelect and explain. \nA. T4, B. Thyroglobulin, C. Calcitonin, D. PTH', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Measurement of peripheral Thyroglobulin has predictive value for the recurrence of differentiated thyroid cancer (ie papillary and follicular thyroid cancers),locally or in metastatic deposits after initial total thyroidectomy . Basal or stimulated calcitonin levels are sensitive markers for primary or recurrent medullary thyroid cancer. Source : Sabiston 20th edition Pg : 886', 'role': 'assistant'}]