Task: Question Answering
Input (English): Question: Point out the correct answer. Lithium salts are used to treat: 
 Options:  <1> The affective symptoms of schizophrenia. <2> The psychotic symptoms of schizophrenia. <3> As a maintenance treatment for bipolar patients with a history of mania. <4> Depressive episodes of bipolar disorder, but not manic episodes. <5> In a drug in disuse and not recommended in the current clinical guidelines.
Output (English): 3