`CH_(2)OHCH_(2)CH_(2)COCH_(3)overset("Reagent")rarr`
`CH_(2)OHCH_(2)CH_(2)CH_(2)CH_(3)`
Suitable reagent for above reaction is :-

Options

A. Zn-`Hg//HCl`
B. `NH_(2)NH_(2)//C_(2)H_(5)ONa`
C. Red P + HI
D. All

Answer

To solve the problem, we need to identify a suitable reagent that can convert the compound \( CH_2OHCH_2CH_2COCH_3 \) (which contains both an alcohol and a ketone) into \( CH_2OHCH_2CH_2CH_2CH_3 \) (which is a primary alcohol with no ketone). The ketone group must be reduced to an alkane while the alcohol group remains unchanged.

### Step-by-Step Solution:

1. **Identify the Functional Groups**:
- The starting compound has an alcohol group (-OH) and a ketone group (C=O). The alcohol is at the first carbon, and the ketone is at the fourth carbon.

2. **Determine the Desired Transformation**:
- We want to convert the ketone group into an alkane while keeping the alcohol group intact. The final product should be a straight-chain alcohol with five carbons.

3. **Evaluate Possible Reagents**:
- **Clemenson Reduction**: This method uses zinc amalgam and HCl to reduce ketones to alkanes. However, it is not suitable here because HCl can protonate the alcohol, leading to its elimination.
- **Wolf-Kishner Reduction**: This method involves hydrazine (NH2NH2) and a strong base (like NaOH). It selectively reduces the ketone to an alkane without affecting the alcohol group. This is a suitable reagent for our transformation.
- **Red Phosphorus and HI**: This reagent would reduce both the ketone and the alcohol to alkanes, which is not what we want.

4. **Conclusion**:
- The only suitable reagent that can selectively reduce the ketone to an alkane while preserving the alcohol is the Wolf-Kishner reduction.

### Final Answer:
The suitable reagent for the reaction is **Wolf-Kishner Reduction**.