How many of the following give isocyanide test?

(A)Tertiary butyl amine

(B)Secondary butyl amine

(C)${\mathrm{CH}}_3{\mathrm{CONH}}_2$

(D)$\mathrm{Ph}-{\mathrm{NH}}_2$

(E)CH₃-CH₂ -NH -CH₃

Isocyanide test is also known as carbylamine test.

It is used to test primary amines by converting it into isocyanide.

${\mathrm{RNH}}_2+{\mathrm{CHCl}}_3+3\mathrm{KOH}\stackrel{\mathrm{\Delta }}{\to }\mathrm{RNC}+3\mathrm{KCl}+3{\mathrm{H}}_2\mathrm{O}$

Here, Tertiary butyl amine, Secondary butyl amine and $Ph-{NH}_2$ are 1 degree amines so they can give carbylamine test.

Hence, option (A), (B) and (D) are correct.