This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Radiology
Binswanger disease refers to? 
Select and explain. 
A. Subcortical arteriosclerotic encephalopathy, B. Hippocampal atrophy, C. Multiple cortical infarcts, D. Extrapyramidal dementia
A: Subcortical arteriosclerotic encephalopathy
Answer: A: Subcortical arteriosclerotic encephalopathy 
Explanation: Ans ABinswanger disease is also known as subcortical leukoencephalopathy and subcortical arteriosclerotic encephalopathy. It is small vessel ischemia related dementia caused commonly by chronic hypertension or old age.