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': 'The most common cause of seizures in a patient of AIDS is - \nSelect and explain. \nA. Toxoplasmosis, B. Cryptococcal meningitis, C. Progessive multifocal leucoencephalopathy, D. CNS lymphoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]