The semi-conservative replication of $DNA$ was proven in:

In which medium did Meselson and Stahl first culture $E. coli$?

During which process are Okazaki fragments formed?

Which enzyme catalyzes the process of reverse transcription?

Given below are two statements.
Statement $I$ - The template strand with free $3'$ end is called leading template and the strand with free $5'$ end is called lagging template.
Statement $II$ - Replication always starts at the $3'$ end of the template strand and proceeds towards the $5'$ end of the template.
In the light of the above statements,select the correct option given below:

Which of the following statements is correct regarding the process of replication in $E. coli$?