Alzheimer disease is a form of:

A) psychosis.
B) dementia.
C) schizophrenia.
D) factitious disorder.

Factitious Disorder

A mental disorder in which a person acts as if they have a physical or mental illness when they are not really sick.

Dementia

A category of brain diseases that cause a long term and often gradual decrease in the ability to think and remember, affecting daily functioning.

Psychosis

A mental disorder characterized by a disconnection from reality, which might include delusions and hallucinations.