At the time of puberty in boys,which hormone triggers changes?

Give the name of two hormones $A$ and $B$ in the figure given below.

Androgens act on the $A$ and influence the male sexual behavior called $B$. These hormones produce $C$ effect on protein and carbohydrate metabolism. Choose the correct combination of $A, B$ and $C$.

In males,$LH$ stimulates the synthesis and secretion of hormones called

Write two major functions each of testis and ovary.

The hormone which brings about characteristic changes in the male at puberty is called: