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'.
One example: Question: A 13-year-old girl is operated on due to Hirschsprung illness at 3 months of age. Which of the following tumors is more likely to be present?
Options: <1> Abdominal neuroblastoma <2> Wilms tumor <3> Mesoblastic nephroma <4> Familial thyroid medullary carcinoma.
Solution is here: 2
Explanation: The answer to the given question should be a tumor, therefore Wilms tumor is the correct answer for the given question.

Now, solve this: 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.
Solution:
3