All the following are featuring Alzheimer's disease except-: (A) Cerebellar atrophy, (B) Common in 5th and 6th decade, (C) Atrophied gyri and widened sulci, (D) Progressive dementia
Answer is A. Cerebellar atrophy is seen in subcortical dementia, therefore, it is not a feature of Alzheimer's disease as it is a cortical type of dementia.

Pathology in Alzheimer's disease

Gross:- Atrophy of gyri, widening of sulci, enlarged ventricles.
Microscopy :- Senile plaque, neurofibrillary tangles, neuronal loss, synaptic loss, granulovascular degeneration.