The one which is capable of self replication is

Options

A. DNA
B. RNA
C. Enzyme
D. Protein

Explanation

**Step-by-Step Solution:**

1. **Understanding Self-Replication:**
- Self-replication refers to the ability of a molecule to make copies of itself. This is a crucial characteristic for genetic material, as it allows for the transmission of genetic information from one generation to the next.

2. **Identifying Candidates:**
- The question presents three candidates: DNA, RNA, and enzymes/proteins. We need to evaluate which of these can replicate themselves.

3. **Analyzing DNA:**
- DNA is known to be the genetic material in many organisms. It replicates in a semi-conservative manner, meaning that each strand of the original DNA serves as a template for the creation of a new complementary strand. The enzyme responsible for this process is DNA polymerase. Thus, DNA can self-replicate.

4. **Analyzing RNA:**
- RNA can also replicate, particularly in the context of early life forms on Earth. However, in contemporary biological systems, RNA does not self-replicate in the same way DNA does. RNA polymerase synthesizes RNA from a DNA template, but there is no enzyme that allows RNA to replicate itself independently. Therefore, RNA does not exhibit true self-replication in current biological contexts.

5. **Analyzing Enzymes/Proteins:**
- Enzymes and proteins do not replicate themselves. They are synthesized through the process of translation, which involves RNA but does not involve self-replication. Thus, enzymes and proteins cannot be considered capable of self-replication.

6. **Conclusion:**
- Based on the analysis, the molecule that is capable of self-replication is **DNA**.

**Final Answer: DNA**

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