Assertion: In Gel electrophorosis, ''the smalller the fragment size, the farther it moves''
Reason :The separation of DNA segments by cutting out the gel is known as elution

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion
B. It both Assertion & Reason are True but Reason is not a correct explanation of the Assetion
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 "in gel electrophoresis, the smaller the fragment size, the farther it moves." This is true because smaller DNA fragments can navigate through the pores of the gel more easily than larger fragments, allowing them to travel further when an electric current is applied.

2. **Understanding the Reason**: The reason provided is that "the separation of DNA segments by cutting out the gel is known as elution." This statement is also true. Elution refers to the process of extracting a substance from a solid by washing with a solvent, in this case, cutting out the gel to obtain specific DNA segments.

3. **Evaluating the Relationship**: While both the assertion and reason are true, the reason does not explain why smaller fragments move farther in gel electrophoresis. The reason describes a process (elution) that occurs after the electrophoresis has taken place, rather than explaining the mechanism behind the assertion.

4. **Selecting the Correct Option**: Since both the assertion and reason are true, but the reason does not provide a correct explanation for the assertion, the correct option is:
- **Option B**: Both assertion and reason are true, but the reason is not a correct explanation of the assertion.