The correct options are
C NaCl
D HCl
KOH and NaOH are the by products of eleectrolysing KCl and NaCl , while NaCl and HCl are the substances which are diluted in the solution to have electrolysis performed. HCl and KCl cannot be separetely formed during the electrolysis because HCl and KCl ionize to form H+ and Cl+andK+ respectively.