Which disorder is characterized by periods of depression and mania?

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Bipolar disorder is characterized by periods of depression and mania. Schizophrenia is a disorder that affects a person's thinking, feeling, and behavior. Obsessive-compulsive disorder is marked by unwanted, intrusive thoughts and repetitive behaviors. Multiple personality disorder (now known as dissociative identity disorder) is a mental health condition characterized by the presence of at least two distinct personality states.

Which Disorder Is Characterized by Periods of Depression and Mania