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'.
Q: Question: What is the main diagnostic characteristic of a Bipolar I Disorder ?:
Options: <1> A disorder in which there is or has been an episode of mania. <2> A disorder in which there is or has been an episode of mania or hypomania. <3> A disorder in which there is or has been an episode of hypomania. <4> A disorder in which cycles of mania and psychosis alternate. <5> A disorder in which cycles of hypomania and depression alternate.
A:
1