$A$ mutant microorganism that is unable to synthesize a compound required for its growth,but is able to grow if the compound is provided,is known as a/an ...... .

Match the following columns correctly.

Column $I$	Column $II$
$(a)$ $m-RNA$	$(i)$ Found in ribosomes
$(b)$ $t-RNA$	$(ii)$ Carries information from $DNA$ to the cytoplasm for protein synthesis
$(c)$ $r-RNA$	$(iii)$ Contains $75$ nucleotides
$(d)$ $RNA$	$(iv)$ $A$ polynucleotide chain containing ribose sugar and uracil base,existing in three types

$A$: Teminism is the unidirectional flow of information.
$R$: It requires $DNA$-dependent $RNA$ polymerase enzyme.

Match the researchers in Column-$I$ with their work given in Column-$II$.

Column-$I$	Column-$II$
$i$. Avery,McCarty,and MacLeod	$a$. $DNA$ digested by DNAse inhibits transformation of $R$ cells to $S$ cells.
$ii$. Griffith	$b$. $DNA$ replication is semi-conservative.
$iii$. Hershey and Chase	$c$. Used Streptococcus pneumoniae.
$iv$. Meselson and Stahl	$d$. Used radioactive Sulphur and Phosphorus.

Select the correct option from the following.

Match List $I$ with List $II$.

List $I$	List $II$
$A$. Frederick Griffith	$I$. Genetic code
$B$. Francois Jacob and Jacques Monod	$II$. Semi-conservative mode of $DNA$ replication
$C$. Har Gobind Khorana	$III$. Transformation
$D$. Meselson and Stahl	$IV$. $Lac$ operon

Choose the correct answer from the options given below:

Given below are two statements:
Statement $I$: Transfer $\text{RNAs}$ and ribosomal $\text{RNA}$ do not interact with $\text{mRNA}$.
Statement $II$: $\text{RNA}$ interference $\text{(RNAi)}$ takes place in all eukaryotic organisms as a method of cellular defence.
In the light of the above statements,choose the most appropriate answer from the options given below.