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.
1