Which of the following conditions is associated with hypersecretion of prolactin?
Cushing's syndrome
Addison's disease
Diabetes insipidus
Prolactinoma
Prolactinoma is a type of pituitary adenoma that causes hypersecretion of prolactin, leading to a variety of symptoms, including menstrual irregularities, galactorrhea, and infertility.
Option d is the correct answer.