Which of the following statements is not false?

Given below are two statements:
Statement-$I$: Insulin acts mainly on hepatocytes and adipocytes.
Statement-$II$: Catecholamines are secreted in response to stress of any kind and during emergency situations.
In the light of the above statements,choose the most appropriate answer from the options given below.

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?

Which of the following statements is incorrect?

Choose the correct option.

$A$. Growth hormone	$i$. Osteoporosis
$B$. Thyroxin	$ii$. Diabetes mellitus
$C$. Parathormone	$iii$. Cretinism
$D$. Insulin	$iv$. Acromegaly

Which of the following statements is correct regarding the relationship between the neural system and the endocrine system?