Option A. Bipolar disorder differs from schizophrenia in that schizophrenia typically involves hallucinations.
What is bipolar disorder?
Bipolar disorder, previously known as manic depression, is a mood disorder characterized by periods of depression and periods of abnormally-elevated happiness that last from days to weeks each.
If the elevated mood is severe or associated with psychosis, it is called mania; if it is less severe, it is called hypomania.
What is schizophrenia?
A disorder that affects a person's ability to think, feel, and behave clearly.
The exact cause of schizophrenia isn't known, but a combination of genetics, environment, and altered brain chemistry and structure may play a role.
What is hallucination?
A perception of having seen, heard, touched, tasted, or smelled something that wasn't actually there.
Hallucination can have causes that aren't due to underlying disease. Examples include drug intoxication.