The replication process involves the following steps:
(I) The enzyme DNA-dependent DNA poly merases catalyse the polymerisation of DNA strand.
(II) The lagging strand is synthesized in frag ments known as Okazaki fragments, which are later joined by the enzyme DNA Ligase.
(III) The origin of replication serves as the recognition site for DNA polymerase and also it provides the site for attachment of RNA primer.
(IV)The structural gene coding for a partic ular protein is flanked by the promoter and terminator.
Choose the correct option:

Options

A. (I),(II)
B. (III),(IV)
C. (I),(II),(III)
D. (I),(II),(III),(V)

Explanation

To solve the question regarding the replication process, we will analyze each statement provided and determine which ones are correct.

### Step-by-Step Solution:

1. **Statement I**: "The enzyme DNA-dependent DNA polymerases catalyse the polymerisation of DNA strand."
- This statement is **correct**. DNA-dependent DNA polymerases are indeed responsible for synthesizing new DNA strands during replication.

2. **Statement II**: "The lagging strand is synthesized in fragments known as Okazaki fragments, which are later joined by the enzyme DNA Ligase."
- This statement is also **correct**. The lagging strand is synthesized discontinuously in short segments called Okazaki fragments, which are subsequently joined together by DNA ligase.

3. **Statement III**: "The origin of replication serves as the recognition site for DNA polymerase and also it provides the site for attachment of RNA primer."
- This statement is **correct** as well. The origin of replication is where the replication process begins, and it is indeed the site where RNA primers attach to initiate DNA synthesis.

4. **Statement IV**: "The structural gene coding for a particular protein is flanked by the promoter and terminator."
- This statement is **not correct** in the context of DNA replication. While it is true that structural genes are flanked by promoters and terminators, this statement pertains to transcription, not replication.

### Conclusion:
Based on the analysis, the correct statements regarding the replication process are I, II, and III. Statement IV is not relevant to the replication process.

### Final Answer:
The correct option includes statements I, II, and III.

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