What is coordination?

How many of the following organs are included in both the endocrine system and the reproductive system?
Kidney,Ovary,Stomach,Small intestine,Pancreas,Testis

Match the name of the hormone in Column-$I$ with its source of secretion in Column-$II$ and its function in Column-$III$.

Column-$I$	Column-$II$ $\&$ Column-$III$
$(a)$ Prolactin	$(m)$ Pituitary gland,$(q)$ Development of lactiferous tubules
$(b)$ Estrogens	$(l)$ Graafian follicle,$(r)$ Secondary sexual characters in females
$(c)$ GnRH	$(n)$ Hypothalamus,$(s)$ Stimulates release of $FSH$
$(d)$ Androgen	$(o)$ Interstitial cells,$(p)$ Secondary sexual characters of males

The hypothalamic hormones reach the pituitary gland through$:-$

Consider the following statements about insulin:
$I$. Human insulin is made up of $51$ amino acids arranged in two polypeptide chains.
$II$. The two polypeptide chains are interconnected by two disulphide bridges.
$III$. In mammals,including humans,insulin is synthesized as a pro-hormone,which contains an extra stretch called the $C$-peptide.
$IV$. $C$-peptide is not present in the mature insulin.
Which of the statements given above are correct?

Mark the incorrect statement.