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
Intellectual detoriation in a 8 year boy with myoclonus is seen in- 
Select and explain. 
A. SSPE, B. C-J disease, C. GSS, D. Kuru
A: SSPE
Answer: A: SSPE 
Explanation: None