Which of the following is not a steroid hormone?

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

Select the mismatch pair from the following.

The products of glands are given below:
Mucus,Saliva,Prolactin,Earwax,Oil,Testosterone,Milk,Digestive enzymes
Products of exocrine glands = $P$
Products of endocrine glands = $Q$
Select the correct option for $P$ and $Q$.

Which of the following is called the "biological middleman"?

The hormones that induce milk secretion,milk ejection,and follicular growth are known as .......... respectively.