$A$ pregnant lady delivers a baby who suffers from stunted growth,mental retardation,low intelligence quotient and abnormal skin. This is the result of $:-$

$A$ man has an $I.Q.$ equivalent to that of a boy $5$ years old; this is due to the deficiency of which hormone?

Name at least two hormones which result in the fluctuation of $Ca^{++}$ levels.

How does the activity of growth hormone relate to thyroxine?

Consider the following statements with respect to Calcitonin:
$I$. It is non-iodised.
$II$. It is secreted by parafollicular cells.
$III$. It regulates the calcium level in blood.
$IV$. It is also called as $TCT$ (Thyrocalcitonin).
$V$. It is a hyperglycemic agent.
Select the option containing correct statements from the above given statements.

Which disease in adults is characterized by the following symptoms: $1.$ Low metabolic rate,$2.$ Increase in body weight,$3.$ Water retention in tissues?