How many of the given statements $(i-iv)$ is/are correct?
$i.$ In transcription,adenosine pairs with uracil.
$ii.$ Regulation of lac operon by repressor is referred to as positive regulation.
$iii.$ The human genome has approximately $50,000$ genes.
$iv.$ Haemophilia is a sex-linked recessive disease.

The figure illustrates an important concept in the genetic implication of $DNA$. Fill in the blanks $A, B$,and $C$.

Match the following in column $I$ with column $II$ and choose the correct combination.

Column $I$	Column $II$
$a.$ Termination	$i.$ Aminoacyl $t-RNA$ synthetase
$b.$ Translation	$ii.$ Okazaki fragments
$c.$ Transcription	$iii.$ $GTP$ dependent release factor
$d.$ $DNA$ replication	$iv.$ $RNA$ polymerase

Consider the following four statements $(a-d)$ and select the option which includes all the correct ones only $:-$
$(a)$ Transcription and translation can be coupled in bacteria.
$(b)$ The split gene arrangements represent the advanced feature of the genome.
$(c)$ The process of splicing represents the dominance of $\text{RNA-}$world.
$(d)$ The presence of introns in split gene is reminiscent of antiquity.

The eukaryotic genome differs from the prokaryotic genome because

Match List-$I$ with List-$II$:

List-$I$	List-$II$
$A$. Monocistronic gene	$I$. Coding sequence
$B$. Polycistronic gene	$II$. Intervening sequence
$C$. Exons	$III$. Mostly prokaryotes
$D$. Introns	$IV$. Mostly eukaryotes