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
[{'content': "All of the following malignancies are associated with HIV, except - \nSelect and explain. \nA. Kaposi's Sarcoma, B. Non Hodgkin's lymphoma, C. Astrocytoma, D. Gastric adeno Carcinoma", 'role': 'user'}, {'content': "Answer: C \nExplanation: Neoplastic disease in AIDS\xa0\n\nKaposi sarcoma (most common tumor)\nNon-Hodgkin lymphoma\n\nImmunoblastic lymphoma (most common lymphoma)\nPrimary CNS lymphoma (associated with EBV)\nBurkitt's lymphoma\nOther less common neoplasm are: Hodgkin's disease, Leukemia,\xa0Multiple myeloma, Melanoma", 'role': 'assistant'}]