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: Medicine
[{'content': "The most common neoplasm among HIV positive homosexual males: \nSelect and explain. \nA. Non-Hodgkin's lymphoma, B. Glomus tumor, C. Kaposi's sarcoma, D. None of the above", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]