Assertion :- The process of splicing represents the dominance of RNA world.
Reason:- In the process of splicing exons are removed and introns are joined in a defined order.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are False.

Answer

### Step-by-Step Solution

1. **Understanding the Assertion**:
- The assertion states that "The process of splicing represents the dominance of the RNA world." This refers to the idea that RNA played a crucial role in early life forms and that it has capabilities that DNA does not, particularly in the context of splicing.

2. **Understanding the Reason**:
- The reason given is "In the process of splicing, exons are removed and introns are joined in a defined order." This statement is incorrect. In splicing, it is actually the introns that are removed and the exons that are joined together.

3. **Clarifying the Process of Splicing**:
- Splicing is a process that occurs after transcription, where the initial RNA transcript (hnRNA) contains both introns (non-coding regions) and exons (coding regions).
- During splicing, the introns are removed, and the exons are joined to form a mature mRNA molecule that can be translated into a protein.

4. **Evaluating the Assertion and Reason**:
- The assertion is true because splicing is a process that highlights the functional importance of RNA in gene expression.
- The reason is false because it incorrectly states that exons are removed instead of introns.

5. **Conclusion**:
- Given that the assertion is true and the reason is false, the correct answer is that the assertion is true and the reason is false.

### Final Answer:
- The assertion is true, and the reason is false.