In which of the following salts only cationic hydrolysis is involved?

Only the salt of strong acids and weak bases form acidic solution and undergoes anionic hydrolysis.

$N{H}_{4}Cl\to N{H}_4^{+}+C{l}^{-}$

$N{H}_4^{+}+H_{2}O\to N{H}_3+H_3{O}^{+}$

 $N{H}_{4}Cl$ is a salt of strong acid and weak base that basically undergoes cationic hydrolysis.