On which of the following did Taylor and his colleagues perform their experiments?

Which of the following enzymes has been incorrectly matched with their function?

$DNA$ gyrase,the enzyme that participates in the process of $DNA$ replication,is a type of:

$A$: Kornberg enzyme is associated with the removal of primers and thymine dimers.
$R$: $DNA$ polymerase $I$ performs exonuclease activity in $5^{\prime} \rightarrow 3^{\prime}$ and $3^{\prime} \rightarrow 5^{\prime}$ directions.

Match List-$I$ with List-$II$ and select the correct answer using the code given below in the lists.

List-$I$	List-$II$
$a$. Ligase	Joins short segments of $\text{DNA}$ together.
$b$. $\text{DNA}$ polymerase	Cuts $\text{RNA}$ at specific $\text{RNA}$ sequence.
$c$. Helicase	Breaks the hydrogen bonds between complementary pairs during $\text{DNA}$ replication.

Which bacteria provided the first evidence that $DNA$ replication is semi-conservative?