Match the following columns.

Column-$I$	Column-$II$
$(A)$ Gene therapy	$(1)$ Effort to fix a functional gene
$(B)$ Humulin	$(2)$ $A$ single-stranded $DNA$ or $RNA$ tagged with a radioactive molecule
$(C)$ Probe	$(3)$ Diagnostic test
$(D)$ $ELISA$	$(4)$ Diabetes

$MRI$ uses .......... .

Which of the following vectors is used to transfer a functional $ADA$ $cDNA$ into the lymphocytes?

$ADA$ deficiency can be cured by

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 synthesised 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?

The first human hormone produced by recombinant $DNA$ technology is