A 35-Year-Old Man Visits His Physician with Complaints of Sudden

Multiple Choice

A 35-year-old man visits his physician with complaints of sudden onset of fatigue,polydipsia,and polyuria.Laboratory results indicate a normal fasting blood sugar.Serum sodium was slightly elevated.The most likely cause of these symptoms and laboratory results would be:

A) diabetes mellitus due to insulin deficiency.
B) secondary hypothyroidism.
C) pituitary adenoma.
D) diabetes insipidus due to hypothalamic dysfunction.