The most suitable reagent for the conversion of 2-phenylpropanamide into 1-phenylethylamine is :-

Options

A. `H_2 Pd //C `
B. `Br_2 ,NaOH `
C. `LiAilH_4 , Et _2 O`
D. `NaBH_ 4 , Me OH `

Explanation

To convert 2-phenylpropanamide into 1-phenylethylamine, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structure of 2-Phenylpropanamide**:
- The molecular structure of 2-phenylpropanamide can be represented as:
\[ \text{C}_6\text{H}_5-\text{C}(\text{C}_2\text{H}_5)-\text{C}(=O)-\text{NH}_2 \]
- Here, the phenyl group (C6H5) is attached to the second carbon of the propanamide structure.

2. **Determine the Target Product**:
- The target product is 1-phenylethylamine, which can be represented as:
\[ \text{C}_6\text{H}_5-\text{C}(\text{C}_2\text{H}_5)-\text{NH}_2 \]
- This structure has one less carbon than the starting material, indicating a potential loss of a carbon atom during the reaction.

3. **Identify the Suitable Reaction**:
- To convert an amide to an amine while reducing the carbon count by one, we can use the Hofmann degradation reaction. This reaction specifically allows for the conversion of amides to amines with the loss of one carbon atom.

4. **Select the Reagent**:
- The reagent used in the Hofmann degradation reaction is bromine (Br2) in the presence of a strong base, such as sodium hydroxide (NaOH).
- Therefore, the reaction can be summarized as:
\[ \text{2-Phenylpropanamide} + \text{Br}_2 + \text{NaOH} \rightarrow \text{1-Phenylethylamine} + \text{byproducts} \]

5. **Conclusion**:
- The most suitable reagent for the conversion of 2-phenylpropanamide into 1-phenylethylamine is **Br2 in the presence of NaOH**.

### Final Answer:
The correct answer is **Br2 in presence of NaOH**.