What is the best reagent to convert nitrile to primary amine

The name of the reaction to convert alkane nitrile to primary aliphatic amine is

Which of the following is the best reagent to convert t -butyl chloride to isobutane?

which of the following is the best reagent to convert alcohol into alkyl choride?

Which of the following reagents can be used to convert primary amides into primary amines containing the same number of carbon atoms ?

Name the reagent used to convert acetamide to methyl amine.

Why is thionyl chloride considered as the best reagent to convert alcohol into alkyl chlorides?

How nitriles are converted into primary amines?