The most appropriate reagent for conversion of $C _{2} H _{5} CN$ into $CH _{3} CH _{2} CH _{2} NH _{2}$ is
  • A$Na ( CN ) BH _{3}$
  • B$LiAlH _{4}$
  • C$NaBH _{4}$
  • D$CaH _{2}$
JEE MAIN 2020, Medium
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