Definition: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
Input: Question: In the DSM-IV classification, bipolar disorder is included within mood disorders. Is defined as: 
 Options:  <1> Syndrome that involves a set of symptoms such as sadness, guilt or loss of vital impulse. <2> Decrease in the ability to obtain pleasure, which leads the person to isolation and unproductivity. <3> Disorder characterized by the presence of episodes of euphoria or depression alternating with eutimia phase. <4> Alteration induced by substances that produce an expansive or irritable mood. <5> Affective state of a relatively autonomous and lasting character over time.
