Given the task definition and input, reply with output. 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'.

Question: Hyponatremia is part of the clinical picture of:
Options: <1> Addison's disease <2> Central diabetes insipidus. <3> Nephrogenic insipid diabetes. <4> Mellitus diabetes. <5> Febrile states.
1