This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lysosomal Storage Diseases, Subject name: Pediatrics
All of the following predominantly involve the white matter EXCEPT? 
Select and explain. 
A. Alexander disease, B. Canavan disease, C. Neuronal ceroid lipofuscinosis, D. Adrenoleukodystrophy
C: Neuronal ceroid lipofuscinosis
Answer: C: Neuronal ceroid lipofuscinosis 
Explanation: Gray matter diseases White matter diseases Clinical features Seizures, impaired vision, dementia Motor problems Examples Neuronal ceroid lipofuscinosis Biotinidase deficiency Pyridoxine deficiency Mitochondrial disorders Alexander disease Canavan disease Adrenoleukodystrophy Metachromatic leukodystrophy Krabbe disease