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
Tissue of origin of Kaposi's sarcoma is: 
Select and explain. 
A. Lymphoid, B. Vascular, C. Neural, D. Muscular
B: Vascular
Answer: B: Vascular 
Explanation: Ans. (b) Vascular