Which of the following is synthesized by RNA Polymerase III ?
(a) tRNA only
(b) sn RNA only
(c) 5s rRNA only
(d) tRNA , 5S rRNA and sn RNA.

Options

A. tRNA only
B. sn RNA only
C. 5s rRNA only
D. tRNA , 5S rRNA and sn RNA.

Answer

To solve the question, "Which of the following is synthesized by RNA Polymerase III?", we will analyze each option based on our knowledge of RNA polymerases and the types of RNA they synthesize.

### Step-by-Step Solution:

1. **Understand RNA Polymerases**:
- There are three main types of RNA polymerases in eukaryotic cells: RNA Polymerase I, RNA Polymerase II, and RNA Polymerase III.
- Each type is responsible for synthesizing different types of RNA.

2. **Identify the Role of RNA Polymerase III**:
- RNA Polymerase III is primarily responsible for synthesizing:
- tRNA (transfer RNA)
- 5S rRNA (a component of the ribosome)
- snRNA (small nuclear RNA)

3. **Evaluate Each Option**:
- **Option (a) tRNA only**: This option is incorrect because RNA Polymerase III synthesizes more than just tRNA.
- **Option (b) snRNA only**: This option is also incorrect as RNA Polymerase III synthesizes multiple types of RNA, not just snRNA.
- **Option (c) 5S rRNA only**: This option is incorrect for the same reason; RNA Polymerase III synthesizes more than just 5S rRNA.
- **Option (d) tRNA, 5S rRNA, and snRNA**: This option is correct because RNA Polymerase III synthesizes all three types of RNA mentioned.

4. **Conclusion**:
- The correct answer is **(d) tRNA, 5S rRNA, and snRNA**.

### Final Answer:
**(d) tRNA, 5S rRNA, and snRNA.**

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