Mature insulin does not contain ........

The use of living organisms or their substances in industrial processes is called:

The first clinical gene therapy was given for treating

How is a permanent cure for $ADA$ deficiency possible?

How many of the following statements are correct?
$(i)$ Mature insulin is made up of $A, B$ and $C$ peptides.
$(ii)$ Removal of $C$-peptide helps in the maturation of insulin.
$(iii)$ In mature insulin,$C$-peptide is present.
$(iv)$ In insulin,chains $A$ and $B$ are linked by disulphide bonds.

Match List-$I$ with List-$II$:

List-$I$	List-$II$
$A$. Genetically engineered Human Insulin	$I$. Gene therapy
$B$. $\text{GM}$ Cotton	$II$. $\text{E. coli}$
$C$. $\text{ADA}$ Deficiency	$III$. Antigen-antibody interaction
$D$. $\text{ELISA}$	$IV$. $\text{Bacillus thuringiensis}$

Choose the correct answer from the options given below: