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': 'Intellectual detoriation in a 8 year boy with myoclonus is seen in- \nSelect and explain. \nA. SSPE, B. C-J disease, C. GSS, D. Kuru', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]