Which one of the following hormones contains iodine?

$I.$ Regulation of $BMR$
$II.$ Supports the process of $RBC$ formation
$III.$ Controls the metabolism of carbohydrates,proteins and fat
$IV.$ Maintenance of water and electrolyte balance
$V.$ Secretion of $TCT$ hormone
Functions written above belong to which of the following glands?

The endodermal derivatives include:

Deficiency of thyroxine in adults leads to a condition characterized by:
$(i)$. Low metabolic rate
$(ii)$. Increase in body weight
$(iii)$. Tendency to retain water in tissues
This condition is known as:

The injection of which of the following increases the metabolic rate?

Which of the following absorbs iodine from blood?