Identify the incorrect pair.

Fill in the blanks:
$Hormones$ $Target$ $gland$
$(a)$ $Hypothalamic$ $hormones$ .....................
$(b)$ $Thyrotrophin$ $(TSH)$ .....................
$(c)$ $Corticotrophin$ $(ACTH)$ .....................
$(d)$ $Gonadotrophins$ $(LH, FSH)$ .....................
$(e)$ $Melanotrophin$ $(MSH)$ .....................

Endocrine glands are those glands that pour their secretions into .....

Which of the following hormones does not contain a polypeptide?

Complete the following analogy-based questions:
$1$. Hyperglycemia : Diabetes Mellitus :: Beta cells : ....
$2$. Excess Growth Hormone : Gigantism :: Low secretion : .......
$3$. Pineal gland : Melatonin :: Somatostatin : .....

Serotonin hormone is secreted by