Hypothalamus is a part of brain but also secrete some hormones. Which of the following characters are correct for hypothalamus?

(i) These hormones regulate the synthesis and secretion of pituitary hormones.

(ii) The hormones produced by hypothalamus are of two types, the releasing hormones and the inhibiting hormones.

(iii) Gonadotropin releasing hormone (GnRH) is a releasing hormone.

(iv) Somatostatin is a releasing hormone.

(v) Hormones of hypothalamus reach the anterior pituitary gland through a portal circulatory system.

(vi) The posterior pituitary is under the direct neural regulation of the hypothalamus.