In which pair, both ions are coloured in aqueous medium

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

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

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-