Assertion:Fluorescein is an adsorption indicator.
Reasoning : The indicator fluorescein is a dye

Options

A. Assertion is true but the Reason is false
B. Assertion is false, Reason is true
C. Both Assertion and Reason are true and the Reason is a correct explanation of the Reason.
D. Both Assertion and Reason are true but Reason is not a correct explanation of the assertion.

Explanation

To solve the question, we will analyze both the assertion and the reasoning provided in the statements.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Fluorescein is an adsorption indicator."
- An adsorption indicator is a type of indicator that changes color when it adsorbs onto the surface of a solid, typically during a titration process. Fluorescein is indeed used as an adsorption indicator in some titrations, such as those involving metal ions.

2. **Understanding the Reasoning**:
- The reasoning states that "The indicator fluorescein is a dye."
- Fluorescein is a synthetic dye that is widely used in various applications, including as a fluorescent tracer and in biological studies. It is indeed classified as a dye.

3. **Evaluating the Truth of Both Statements**:
- Both the assertion and the reasoning are true. Fluorescein is an adsorption indicator, and it is also a dye.

4. **Analyzing the Relationship Between Assertion and Reasoning**:
- While both statements are true, the reasoning does not explain why fluorescein is classified as an adsorption indicator. The fact that it is a dye does not inherently make it an adsorption indicator; the mechanism of adsorption is what qualifies it as such.

5. **Conclusion**:
- Therefore, we conclude that both the assertion and the reasoning are true, but the reasoning is not the correct explanation of the assertion.

### Final Answer:
Both assertion and reason are true, but the reason is not the correct explanation of the assertion.

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