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: Medicine
[{'content': 'What is the least common cause of seizures in AIDS patients? \nSelect and explain. \nA. Toxoplasmosis, B. Cerebral lymphoma, C. Progressive multifocal leukoencephalopathy, D. Cryptococcal meningitis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Most common causes of seizures in AIDS patients are cerebral toxoplasmosis(40%), primary CNS lymphoma(15 - 35%), cryptococcal meningitis(8%) and HIV encephalopathy(7 -50%). Seizures can also be caused by less common causes such as CNS tuberculosis, aseptic meningitis and progressive multifocal leukoencephalopathy.', 'role': 'assistant'}]