This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
[{'content': "The tissue of origin of the Kaposi's sarcoma is - \nSelect and explain. \nA. Lymphoid, B. Vascular, C. Neural, D. Muscular", 'role': 'user'}, {'content': 'Answer: B \nExplanation: It is an indolent, multifocal, nonmetastatic mucosal or cutaneous tumor probably of endothelial origins REF:ANANTHANARAYANAN TEXTBOOK OF MICROBIOLOGY 9EDITION PGNO.576', 'role': 'assistant'}]