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
All are associated with paraneoplastic syndromes except - 
Select and explain. 
A. Cerebeller degeneration, B. Progressive multifocal leucoencephalopathy, C. Amyotropic lateral sclerosis, D. Opsoclonus myoclonus
B: Progressive multifocal leucoencephalopathy
Answer: B: Progressive multifocal leucoencephalopathy 
Explanation: None