This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Plastic Surgery and Skin Lesions, Subject name: Surgery
[{'content': 'All of the following are markers of melanoma except:- \nSelect and explain. \nA. S-100, B. Cytokeratin-20, C. HMB-45, D. Vimentin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Markers of melanoma are S-100, HMB-45, Vimentin.', 'role': 'assistant'}]