The set having ions which are coloured and paramagnetic both is: [JEE Main 2021, 22 Jul (Shift 2)]

\(Ni ^{2+}, Mn ^{7+}, Hg ^{2+}\)

\(Cu ^{+}, Zn ^{2+}, Mn ^{4+}\)

\(Sc ^{3+}, V ^{5+}, Ti ^4\)

\(Cu ^{2+}, Cr ^{3+}, Sc ^{+}\)