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: Unknown
In Alzheimer’s disease, plaque is made up of: 
Select and explain. 
A. Tau protein, B. Beta amyloid, C. Huntington, D. Alpha synuclein
B: Beta amyloid
Answer: B: Beta amyloid 
Explanation: (Refer: Robbins Pathologic Basis of Disease, 8thedition, pg no: 1313-1317)
Morphology of Alzheimer's disease

Cortical atrophy especially in frontal, temporal and parietallobes.
Compensatory ventricular enlargement due to loss ofparenchyma and reduced brain volume - (hydrocephalus exvacuo).
Structures involved early - medial temporal lobe, including hippocampus entorhinal cortex and amygdala.
Progressive severe neuronal loss and reactive gliosis