Identify the correct match for the given apparatus.
Apparatus $\to$ Function

Find the correct match.

$I$	$II$	$III$
$(a)$ $PCR$	$(i)$ Specific base sequence	$p.$ $Taq$ polymerase
$(b)$ Downstream processing	$(ii)$ Inheritable gene	$q.$ Ampicillin resistant
$(c)$ Restriction endonuclease	$(iii)$ Amplification of $DNA$	$r.$ $E. coli$
	$(iv)$ Product separation and modification	$s.$ Quality control

Match the organism with its use in biotechnology:

$(a)$ Bacillus thuringiensis	$(i)$ Cloning vector
$(b)$ Thermus aquaticus	$(ii)$ Construction of first rDNA molecule
$(c)$ Agrobacterium tumefaciens	$(iii)$ $DNA$ polymerase
$(d)$ Salmonella typhimurium	$(iv)$ Cry proteins

$(a)\quad (b)\quad (c)\quad (d)$

Identify '$U$','$V$' and '$W$' in the given figure of $pBR322$.

Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
Assertion $(A):$
Polymerase chain reaction is used in $DNA$ amplification.
Reason $(R):$
The ampicillin resistant gene is used as a selectable marker to check transformation.
In the light of the above statements,choose the correct answer from the options given below:

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.