Match the following columns:

Column-$I$	Column-$II$
$(a)$ $Salmonella$	$(1)$ $Ti$ plasmid
$(b)$ $E. coli$	$(2)$ Thermostable $DNA$ polymerase
$(c)$ $Agrobacterium$ $tumefaciens$	$(3)$ Plasmid for first $r-DNA$
$(d)$ $Thermus$ $aquaticus$	$(4)$ $EcoR I$

$A$ - Transformation is a procedure through which a piece of $DNA$ is introduced in a host bacterium.
$R$ - With the help of $PCR$,thousands of $DNA$ copies are formed.

Read the following statements carefully and select the correct option $:-$
$(A)$ Source of the restriction enzyme Hind $II$ is Haemophilus influenzae.
$(B)$ If any protein encoding gene is expressed in a heterologous host,it is called as recombinant protein.
$(C)$ Microinjection method for injecting foreign gene is used for animal cell.
$(D)$ $\text{DNA}$ primers are chemically synthesized oligonucleotides that are complementary to the regions of $\text{DNA}$ in $\text{PCR}$.
How many of the above statements are correct?

What do '$S$' and '$T$' represent in the given figure of a stirred-tank bioreactor?

Identify the figure.

Identify the figure given below.