In which of the following pairs are both the ions coloured in aqueous solution- <br> [At. No. : Sc = 21, Ti = 22, Ni = 28, Cu = 29, Co = 27]

Question

( A ) $Sc^{3+},Co^{2+}$
( B ) $Sc^{3+},Ti^{3+}$
( C ) $Ni^{2+},Ti^{3+}$
( D ) $Ni^{2+},Cu^{+}$