Assertion: The newly formed RNA dictates the synthesis of protein at the ribosome.
Reason : DNA has a double helical structure while RNA has single stranded structure.

Options

A. Assertion and reason both are correct statements and reason is correct explanation for assertion.
B. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
C. Assertion is correct statement but reason is wrong statement.
D. Assertion is wrong statement but reason is correct statement.

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "the newly formed RNA dictates the synthesis of protein at the ribosome." This refers to the role of messenger RNA (mRNA) in the process of protein synthesis, where mRNA carries the genetic information from DNA to the ribosome, where proteins are synthesized.

2. **Understanding the Reason**:
- The reason given is "DNA has a double helical structure while RNA has a single stranded structure." This is a factual statement about the structural differences between DNA and RNA. DNA is indeed double-stranded and forms a double helix, while RNA is typically single-stranded.

3. **Linking Assertion and Reason**:
- While both statements are true, the reason does not directly explain why the assertion is correct. The assertion is about the role of mRNA in protein synthesis, while the reason merely describes the structural differences between DNA and RNA.

4. **Conclusion**:
- Therefore, we conclude that both the assertion and the reason are correct statements, but the reason is not the correct explanation for the assertion.

5. **Final Answer**:
- The correct option is that both the assertion and reason are correct, but the reason is not the correct explanation for the assertion.