The neurohypophysis failure

Diabetes occurs in several forms.  Although diabetes can be caused by physical damage to the kidneys, most forms are the result of endocrine abnormalities. Mark and Sarah are close friends who attend the same college. They both complained of extreme thirst and frequent urination. Mark’s doctor confirmed that he had developed a form of diabetes that was a result of the neurohypophysis failure to release adequate amounts of a particular hormone. Sarah, however, after going to her physician found out that she was hyperglycemic and glucose was present in her urine (glycosuria).
State the type of diabetes that i. Mark and ii. Sarah has hormones that are involved in their respective conditions.