Correct Answer - D
This is carbylamine reaction which is used to distinguish `1^@` amines from other amines . The reaction is given by `1^@` amines only.
`C_2H_5NH_2 + CHCl_3 + 3KOH to C_2H_5N undersetto= C + 3KCl + 3H_2O`
`underset(1^@ "amine")(RNH_2) + underset"Chloroform"(CHCl_3) + 3KOH to underset"(bad smelling)"underset"Isocyanide"(RN undersetto=C)+3KCl + 3H_2O`
