A : RNA polymerase is of three types in eukaryotes for the synthesis of all types of RNAs.
R : RNA polymerase consists of six types of polypeptides along with rho factor which is involved in termination of RNA synthesis.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark
B. If both Assertion & Reason are true and the reason is not the correct explanation of the assertion , then mark
C. If Assertion is ture statement but Reason is false, then mark.
D. If both Assertion and Reason are false statements, then mark.

Answer

To solve the assertion and reason question, we need to analyze both the assertion (A) and the reason (R) provided.

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that "RNA polymerase is of three types in eukaryotes for the synthesis of all types of RNAs."
- In eukaryotes, there are indeed three types of RNA polymerases:
- **RNA Polymerase I**: Synthesizes rRNA (except 5S rRNA).
- **RNA Polymerase II**: Synthesizes mRNA, miRNA, and snRNA.
- **RNA Polymerase III**: Synthesizes tRNA and 5S rRNA.
- Therefore, the assertion is **true**.

2. **Understanding the Reason (R)**:
- The reason states that "RNA polymerase consists of six types of polypeptides along with rho factor which is involved in termination of RNA synthesis."
- In reality, RNA polymerase in eukaryotes is composed of five types of polypeptides, not six. The rho factor is typically associated with prokaryotic RNA polymerase and is not a component of eukaryotic RNA polymerases.
- Therefore, the reason is **false**.

3. **Conclusion**:
- Since the assertion is true and the reason is false, the correct answer is that the assertion is true, but the reason is false.

### Final Answer:
- The correct option is: **Assertion is true, Reason is false**.

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