I(salt)	II Type of Hydrolysis
A) ${\mathrm{CuSO}}_4$	I) Cationic and anionic hydrolysis
B) ${\mathrm{KNO}}_3$	II) Anionic hydrolysis
C) $\mathrm{NaCN}$	III) Cationic hydrolysis
D) ${\mathrm{H}}_3{\mathrm{CCOONH}}_4$	IV) No hydrolysis

Correct match is

${\mathrm{CuSO}}_4$   … Salt of SA – WB ….  ${\mathrm{Cu}}^{+2}$ undergoes hydrolysis
${\mathrm{KNO}}_3$           ….Salt of SA–SB … No hydrolysis
$\mathrm{NaCN}$ …..Salt of WA – SB … ${\mathrm{CN}}^{-}$ undergoes hydrolysis
${\mathrm{H}}_3{\mathrm{CCOONH}}_4$ …Salt of WA – WB … ${{\mathrm{H}}_3{\mathrm{CCOO}}^{-}}^{ }\&{\mathrm{NH}}_4^{+}$ undergo hydrolysis.