Assertion: Phenoxiede ion treatment with active alkyl halide (e.g., `CH_(2)=CH-CH_(2)Cl`) gives two products viz. O-substituted and C-substituted.
Reason: Phenoxide ion is an ambident nucleophile.

Options

A. If both assertion and Reason are true and the Reason is the correct explanation of the assertion.
B. If both assertion and Reason are true but the reason is not the correct explanation of the assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false.

Explanation

To solve the question, we need to analyze both the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that when phenoxide ion is treated with an active alkyl halide (like `CH2=CH-CH2Cl`), it produces two products: O-substituted and C-substituted derivatives.
- Phenoxide ion (C6H5O-) can act as a nucleophile and can attack either through the oxygen atom or the carbon atom of the aromatic ring.

**Hint**: Identify the nature of phenoxide ion and its ability to act as a nucleophile.

2. **Understanding the Reason**:
- The reason states that phenoxide ion is an ambident nucleophile. An ambident nucleophile is one that can attack through two different sites.
- In the case of phenoxide ion, it can attack either through the oxygen atom (resulting in O-substitution) or through the carbon atom of the aromatic ring (resulting in C-substitution).

**Hint**: Recall the definition of ambident nucleophiles and how they can lead to multiple products.

3. **Evaluating the Truth of the Statements**:
- Both the assertion and the reason are true. The assertion correctly describes the products formed from the reaction, and the reason accurately explains why this occurs (due to the ambident nature of the phenoxide ion).

**Hint**: Confirm the validity of both statements based on chemical principles.

4. **Conclusion**:
- Since both the assertion and the reason are true, and the reason provides a correct explanation for the assertion, we conclude that the correct answer is that both the assertion and reason are true, and the reason is the correct explanation for the assertion.

**Hint**: Look for options that align with the truth of both statements.

### Final Answer:
The correct answer is: **Both assertion and reason are true, and the reason is the correct explanation for the assertion.**