The most effective reagent among the following to convert 2-phenylpropanamide into 2-phenylpropanamine is:

1. Excess H2
2. Br2 in aqueous NaOH
3. Iodine in the presence of phosphorus
4. LiAlH4 in ether

Hint: It is a reduction reaction. 
The best reagent tor converting 2-phenylpropanamide into 2- phenylpropanamine is LiAlH4 in ether.
Reaction is as given below :
It is a reduction reaction in which amide is convert into amine.