You will be given a definition of a task first, then some input of the task.
In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.

Question: When two or more major depressive episodes occur, separated by a period of at least two months, during which the individual does not become depressed, what is diagnosed?
Options: <0> Major depressive disorder. <1> Dysthymic disorder. <2> Cyclothymic disorder <3> Major recurrent depressive disorder. <4> Depressive episode
Output:
psychology