Disorder characterized by a set of inflexible, maladaptive behavior patterns that keep a person from functioning appropriately in society; lack of personal distress

The answer is dementia, usually develops slowly, first sign is confusion, followed by either a lack of reality or loss of short term memory. often patients develop symptoms that are real to patient, but are not there for families 2 witness.

Answerdatabase;

Ithink is b. or c.