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': "Kaposi's sarcoma is caused by- \nSelect and explain. \nA. HHV-5, B. HHHV -5, C. HHV-7, D. HHV-8", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]