Q.
$C_6H_5NH_2 \xrightarrow{NaNO_2HCl} X\xrightarrow{ Cu_2(CN)_2} Y\xrightarrow {X_2O/H^+} Z$
$Z$ is identified as:
Amines
Solution:
Correct answer is (b) $C_6H_5 - COOH$