Which one of the following correctly represents the manner of replication of $DNA$?

What is the correct chronological sequence of the following events?
$1.$ Formation of the chromosome theory of heredity
$2.$ Experiments which proved that $DNA$ is the hereditary material
$3.$ Mendel's laws of inheritance discovery
Code:

The alternative valence states of $DNA$ bases in $A=T$ and $G=C$ pairs are known as:

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.

$A$ $DNA$ strand is directly involved in the synthesis of the following,except:

Match the following columns:

Column-$I$	Column-$II$
$(p)$ $AUG$	$(a)$ Transposons
$(q)$ $UGA$	$(b)$ Jacob and Monod
$(r)$ Jumping genes	$(c)$ Termination codon
$(s)$ Operon model	$(d)$ Methionine