This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Anatomy
Reversible dementia is seen in? 
Select and explain. 
A. Alzheimer's disease, B. Hypothyroidism, C. Subacute demyelination of spinal cord, D. Pick's disease
B: Hypothyroidism
Answer: B: Hypothyroidism 
Explanation: Causes of Reversible dementia: Hypothyroidism (Myxoedema) Thiamine deficiency Vitamin B12 deficiency Normal pressure hydrocephalus (NPH) Subdural hematoma Chronic infection Brain abscess