Intercellular communication in multicellular organisms occurs through

Which of the following statements is incorrect?

Which of the following processes occur in animals?

The control system of the body is.....

Given below is an incomplete table about certain hormones, their source glands, and one major effect on the human body.
Identify the correct option for the three blanks $A$, $B$, and $C$.

Gland	Secretion	Effect on Body
$A$	Oestrogen	Maintenance of secondary sexual characters
Alpha cells of islets of Langerhans	$B$	Raises blood sugar level
Anterior pituitary	$C$	Over secretion leads to gigantism

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?