Which of the following is true about functions of paraventricular and supraoptic nuclei?: (A) Regulate water balance, (B) Produce oxytocin and ADH respectively, (C) Destruction can lead to diabetes insipidus, (D) All of the above
Answer is D. Paraventricular and supraoptic nuclei:

Regulate water balance.
Produce ADH (Supraoptic) and oxytocin (Paraventricular) which are stored in posterior pituitary.
Destruction causes diabetes insipidus.
Paraventricular nucleus projects to autonomic nuclei of brainstem and spinal cord.