Match the Column-$I$ with Column-$II$:

Column-$I$	Column-$II$
$(a)$ $K$.$C$. Mehta	$(i)$ Fluid mosaic model
$(b)$ $P$. Maheshwari	$(ii)$ First recombinant plasmid
$(c)$ Cohen and Boyer	$(iii)$ Haploid culture
$(d)$ Singer and Nicolson	$(iv)$ Rust disease

$A$: Selection of recombinants due to inactivation of antibiotics is a cumbersome procedure.
$R$: It requires simultaneous plating on two plates having different antibiotics.

Assertion $:-$ The tumor inducing $(Ti)$ plasmid of $Agrobacterium$ $tumefaciens$ has now been modified into a cloning vector.
Reason $:-$ Retroviruses have been disarmed and are now used to deliver genes into animal cells.

$DNA$ recombinant technology can be:

Match the following columns:

Column $I$	Column $II$
$A$. Recombinant $DNA$	$1$. Sea weeds
$B$. Gel electrophoresis	$2$. $DNA$ staining
$C$. Ethidium bromide	$3$. Plasmid $DNA$ that has incorporated human $DNA$
$D$. Agarose	$4$. Process by which $DNA$ fragments are separated based on their size

Consider the following statements:
$I.$ Recombinant $DNA$ technology,popularly known as genetic engineering,is a stream of biotechnology which deals with the manipulation of genetic material by man in vitro.
$II.$ $pBR322$ is the first artificial cloning vector developed in $1977$ by Bolivar and Rodriguez from $E. coli$ plasmid.
$III.$ Restriction enzymes belong to a class of enzymes called nucleases.
Which of the statements given above are correct?