Identify the odd one out:

If $X$ is a hormone which controls the carbohydrate metabolism in the body and $Y$ is a hormone which controls the secretion of $X$,then $X$ and $Y$ are

Give example$(s)$ of:
$(a)$ Hyperglycemic hormone and hypoglycemic hormone
$(b)$ Hypercalcemic hormone
$(c)$ Gonadotrophic hormones
$(d)$ Progestational hormone
$(e)$ Blood pressure lowering hormone
$(f)$ Androgens and estrogens.

Which of the following statements is correct regarding the mechanism of hormone action in humans?

Define the following:
$(a)$ Exocrine gland,
$(b)$ Endocrine gland,
$(c)$ Hormone.

The trace element essential for the maximum effect of insulin in glucose uptake is ...... .