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': 'Most common CNS neoplasm in HIV patient ? \nSelect and explain. \nA. Meduloblastoma, B. Astrocytoma, C. Primary CNS lymphoma, D. Ependymoma', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is `c' i.e., Primary CNS lymphoma o Primary CNS lymphoma accounts for 2% of extranodal lymphomas and 1% of intracranial tumors. o It is the most common CNS neoplasm in immunosuppressed patients, including those with AIDS and immunosuppression after transplantation.", 'role': 'assistant'}]