The best reagent for converting, 2-phenylpropanamide into 1-phenylethanamine is .... ....

1.  Excess H2 / Pt

2.  NaOH / Br2

3. NaBH4 / Methanol

4.  LiAlH4 / Ether

Hint: Hofmann bromamide reaction
 
The best reagent for converting 2-phenylpropanamide into 1-phenylethanamine is by NaOH / Br2 and chemical transformation can be done as follows:
 
 
 
This occurs due to intramolecular migration of alkyl group. It is an example of Hofmann bromamide reaction.