Your elderly grandfather is deteriorating. At first, he seemed only mildly forgetful, but lately he has had trouble recalling the names of close relatives and cannot remember where he is. He used to be very loving and patient, but now he is very unpleasant, and his condition is worsening. He is MOST likely experiencing:

A) presenile delirium.
B) intellectual developmental disorder.
C) Alzheimer's disease.
D) stroke-induced neurocognitive disorder.

Alzheimer's Disease

A progressive neurological disorder that results in memory loss, cognitive decline, and personality changes, typically in older adults.

Neurocognitive Disorder

A category of mental health disorders that primarily affect cognitive abilities including learning, memory, perception, and problem-solving.

Presenile Delirium

A state of mental confusion and reduced awareness of the environment, occurring before the typical age associated with senile dementia.