In which pair, both ions are coloured in aqueous medium

In which of the following pairs, both the ions are coloured in aqueous solution?

IN which of the following pairs, both the ions are coloured in aqueous solutions ?

In which of the following paris both the ions are coloured in aqueous solution? (Atomic number, Sc - 21, Ti = 22, Ni = 28, Cu = 29, Co = 27)

In which of the following pairs are both the ions coloured in aqueous solution-