This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hallmarks of Cancer, Subject name: Pathology
[{'content': 'Melanocytic marker is? \nSelect and explain. \nA. CD99, B. HMB-45, C. NMP-22, D. CA-125', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., HMB-45 Markers for melanocytes1) S-100 - 90% of tumors are positive2) HMB-45 - More specific but less sensitive than S-1003) TA-904) Tyrosinase5) Microphthalmia transcription factor 6) Melan-A", 'role': 'assistant'}]