The end product of the reaction $C_2H_5NH_2$ $\xrightarrow{HNO_2} A$ $\xrightarrow{PCl_5} B$ $\xrightarrow{KCN} C$ is

  • A
    $Ethyl \ amine$
  • B
    $Diethyl \ amine$
  • C
    $Propane \ nitrile$
  • D
    $Triethyl \ amine$

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