Identification and binding of $RNA$ polymerase to the promoter sequence is a function of

In the process of transcription, the sigma factor is important for:

Which of the following enzymes is responsible for the synthesis of $tRNA$ in eukaryotes?

The Pribnow box is a consensus sequence of $6$ bases,forming a binding site for $E. coli$ $RNA$ polymerase at the promoter.

$A$: Sigma factor of $RNA$ polymerase recognizes the start signal region in prokaryotes.
$R$: Promoter region lies at $5'$ end of the coding strand, not the template strand.

Which of the following statements are correct?
$(i)$ From one molecule of $\text{DNA}$,several molecules of $\text{RNA}$ can be formed.
$(ii)$ The $\text{RNA}$ forming part is known as the translational unit.
$(iii)$ The promoter is located at the $5'$ upstream end.
$(iv)$ The promoter and terminator flank the structural gene in a transcription unit.