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': 'HMB 45 is a tumor marker for \nSelect and explain. \nA. Neuroblastoma, B. Neurofibroma, C. Malignant melanoma, D. Angiosarcoma', 'role': 'user'}, {'content': "Answer: C \nExplanation: Malignant melanoma expresses HMB45 ,S-100 and vimentin\xa0\nHMB 45 is present in melanosome and is more specific\xa0\nS-100 is more sensitive but is non specific (also present in LAngerhan's cell histiocytosis, neural tumors and sarcomas like Liposarcoma and Chondrosarcoma)", 'role': 'assistant'}]