What is the sequence of mRNA if the sequence of the coding strand in a transcription unit is written as $5'-ATGCATGCA-3'$?

$RNA$ polymerase $II$ is responsible for the transcription of . . . . . .

$A$ : $RNA$ polymerase is of three types in eukaryotes for the synthesis of all types of $RNAs$.
$R$ : $RNA$ polymerase consists of six types of polypeptides along with rho factor which is involved in termination of $RNA$ synthesis.

Which of the following acts as a substrate for $RNA$ polymerase enzymes?

$RNA$ polymerase binds to the .........

Which of the following is not a region of a transcription unit?