Which $RNA$ carries information from $DNA$ in protein synthesis?

Which of the following statements are correctly related to the given diagram of transcription?
$(a)$ $A$ is the Coding strand
$(b)$ $A$ is the Non-coding strand
$(c)$ $B$ is the Antisense strand
$(d)$ $B$ is the Sense strand

The given figure represents a transcription unit. Select the correct option from the following.
Coding strand $\quad\quad$ Promoter

Identify the enzyme that helps in unwinding the $DNA$ helix during transcription.

$A$ : $RNA$ 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.

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