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: Microbiology
Multifocal tumor of vascular origin in a patient of AIDS- 
Select and explain. 
A. Kaposi's sarcoma, B. Astrocytoma, C. Gastric Carcinoma, D. Primary CNS lymphoma
A: Kaposi's sarcoma
Answer: A: Kaposi's sarcoma 
Explanation: None