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': 'In Medullary Carcinoma thyroid Tumour marker is- \nSelect and explain. \nA. TSH, B. Calcitonin, C. T3, T4 and TSH, D. Alpha Feto protein', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]