Statement-I:Primay benzylic halides are more reactive than primary alkyl halides towards `S_(N^(1))` reaction.
Because Statement-II: Reactivity depends upon the nature of the nucleophile and the solvent.

Options

A. Statement-I is True, Statement-II is True, Statement-II is a correct explanation for Statement-I
B. Statement-I is True, Statement-II is True, Statement-II is NOT a correct explanation for Statement-I
C. Statement-I is True, Statement-II is False.
D. Statement-I is False, Statement-II is True.

Answer

To solve the question, we need to analyze both statements provided and determine their validity and relationship.

### Step 1: Analyze Statement-I
**Statement-I:** Primary benzylic halides are more reactive than primary alkyl halides towards SN1 reaction.

- **Definition of Benzylic Halides:** Benzylic halides are those where the halogen is attached to a carbon that is adjacent to a benzene ring (e.g., C6H5-CH2-X).
- **SN1 Reaction Mechanism:** The SN1 reaction involves the formation of a carbocation intermediate. The rate of the reaction is dependent on the stability of this carbocation.
- **Carbocation Stability:**
- A benzylic carbocation (formed from a benzylic halide) is resonance-stabilized due to the adjacent benzene ring, which can delocalize the positive charge.
- In contrast, a primary alkyl halide forms a primary carbocation, which is less stable as it lacks resonance stabilization.

**Conclusion for Statement-I:** Since the benzylic carbocation is more stable than the primary carbocation, primary benzylic halides are indeed more reactive than primary alkyl halides towards SN1 reactions. Thus, Statement-I is **True**.

### Step 2: Analyze Statement-II
**Statement-II:** Reactivity depends upon the nature of the nucleophile and the solvent.

- **Nucleophile Influence:** In SN1 reactions, the nucleophile does not directly affect the rate of the reaction because the rate-determining step is the formation of the carbocation. However, a better nucleophile can influence the overall reaction rate in subsequent steps.
- **Solvent Influence:** The solvent can significantly affect the stability of the carbocation. Polar protic solvents stabilize carbocations better than polar aprotic solvents. Thus, the choice of solvent can impact the rate of the SN1 reaction.

**Conclusion for Statement-II:** The statement is correct in that reactivity can depend on the nucleophile and solvent, but it does not directly explain the increased reactivity of benzylic halides over primary alkyl halides in the context of SN1 reactions. Therefore, Statement-II is **True** but does not serve as a correct explanation for Statement-I.

### Final Conclusion:
- **Statement-I is True.**
- **Statement-II is True.**
- **Statement-II is not the correct explanation of Statement-I.**

Thus, the correct answer is that both statements are true, but Statement-II does not explain Statement-I.