Which enzyme helps in the process of $DNA$ transcription?

Messenger $RNA$ $(mRNA)$ is produced in:

Which process involves the flow of genetic information from $DNA$ to $RNA$?

$A$ : $RNA$ 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.

The process by which $DNA$ of the nucleus passes genetic information to $mRNA$ is known as:

Eukaryotic $RNA$ polymerase $III$ catalyzes the synthesis of