What is the error in the above diagram?

Which of the following uses $RNA$ as a template for $DNA$ synthesis?

$DNA$ polymerase is required for:

Given below are the two statements.
Statement $I$: In prokaryotes,there is only one replicon,however,in eukaryotes,there are several replicons in tandem.
Statement $II$: The two separated strands in a replicon of $DNA$ are prevented from rejoining by helicase enzyme.
In the light of the above statements,choose the correct answer from the options given below.

Which bond does $DNA$ helicase break in $DNA$?

During $DNA$ replication,the strands separate by