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: Pathology
[{'content': 'All of the following are examples of tumor markers, except: \nSelect and explain. \nA. Alpha-HCG (?-hCG), B. Alpha-Feto protein, C. Thyroglobulin, D. ?2 microglobulin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: . Alpha-HCG (I+--hCG)', 'role': 'assistant'}]