Experts please answer...

Dear student,

Hypophyseal portal system consists of a system of blood vessels in the brain that connects the hypothalamus with anterior pituitary. The hormones that can be detected are GnRH (Gonadotropin releasing hormone) , CRH (corticotropin releasing hormone) GHRH (Growth hormone releasing hormone)TRH (Thyrotropin releasing hormone ) and somatostatin 

Thus correct option is 2nd

Regards