Choose the Odd One Out:
1. Testosterone, Epinephrine, Progesterone, Aldosterone.
2. Cortisone, Cortisol, Progesterone, Epinephrine.
3. Insulin, Glucagon, Diabetes insipidus, Diabetes mellitus.
4. Glucocorticoids, Mineralocorticoids, Corticotrophin, Sex corticoids.
5. FSH, ICSH, Prolactin, LH.
6. Insulin, blood sugar, adrenaline, thyroxine.