During the qualitative analysis of salt with cation \( y^{2+} \), addition of a reagent \( (X) \) to alkaline solution of the salt gives a bright red precipitate The reagent \( (X) \) and the cation \( (y^{2+}) \) present respectively are;
Dimethylglyoxime and \( \mathrm{Ni^{2+}} \)
Dimethylglyoxime and \( \mathrm{Co^{2+}} \)
Nessler's reagent and \( \mathrm{Hg^{2+}} \)
Nessler's reagent and \( \mathrm{Ni^{2+}} \)
