Deficiency of which hormone causes diabetes insipidus?
- Insulin
- ADH
- Thyroxine
- Cortisol
Answer: ADH
ADH (Antidiuretic Hormone/Vasopressin) from posterior pituitary promotes water reabsorption in kidneys. Deficiency causes excessive dilute urine (diabetes insipidus), distinct from diabetes mellitus. [[NCERT Biology Class 11]]