The correct option is C Vasopressin
Diabetes insipidus is caused by a lack of antidiuretic hormone (ADH), also called vasopressin, which prevents dehydration, or the kidney's inability to respond to ADH. ADH enables the kidneys to retain water in the body. The hormone is produced in the hypothalamus. It is stored and released from the pituitary gland. The primary symptoms of diabetes insipidus are excessive thirst and urination.