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: Pathology
All of the following malignancies are associated with HIV, except - 
Select and explain. 
A. Kaposi's Sarcoma, B. Non Hodgkin's lymphoma, C. Astrocytoma, D. Gastric adeno Carcinoma
C: Astrocytoma
Answer: C: Astrocytoma 
Explanation: Neoplastic disease in AIDS 

Kaposi sarcoma (most common tumor)
Non-Hodgkin lymphoma

Immunoblastic lymphoma (most common lymphoma)
Primary CNS lymphoma (associated with EBV)
Burkitt's lymphoma
Other less common neoplasm are: Hodgkin's disease, Leukemia, Multiple myeloma, Melanoma