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': 'Most specific immunohistochemical marker for melanoma cells is \nSelect and explain. \nA. S-100, B. Melan-A, C. HMB-45, D. Chromogranin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: HMB-45 is the most specific for melanoma cells.\nS-100 is the most sensitive marker.', 'role': 'assistant'}]