What enzyme replaces RNA primer on the leading strand with DNA?

A primase is a type of lagging strand template which means that it will not be able to do its replacement properly. A polymerase I, on the other hand, will have the ability to extend so that the RNA segments will be removed. This means that the right answer is C. It will then extend to fill the gaps wherein the RNA fragments are removed.

This can form the needed fragments. This is when the RNA primers will be removed and they will be replaced by DNA. The DNA ligase will be in charge of connecting the various fragments of the DNA. Polymerase III will be used before Polymerase I.