After several weeks of feeling gloomy and being socially withdrawn,Marco has suddenly become extremely sociable and talkative.He doesn't seem to need any sleep,and he becomes irritated when his friends tell him to slow down.Which disorder is consistent with Marco's behaviour

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Marco's sudden change in behavior, decreased need for sleep, and irritability when told to slow down are consistent with symptoms of a manic episode in bipolar disorder. Obsessive-compulsive disorder involves intrusive thoughts and compulsive behaviors, histrionic personality disorder involves excessive attention-seeking behavior, and schizophrenia involves symptoms such as delusions and hallucinations that are not present in Marco's description.

After Several Weeks of Feeling Gloomy and Being Socially Withdrawn,Marco