d- and f-Block · Coloured ions and lanthanoid redox

Given below are two statements :

Statement I : The number of pairs, from the following, in which both the ions are coloured in aqueous solution is 3.

[$\ce{Sc^{3+}}$, $\ce{Ti^{3+}}$], [$\ce{Mn^{2+}}$, $\ce{Cr^{2+}}$], [$\ce{Cu^{2+}}$, $\ce{Zn^{2+}}$] and [$\ce{Ni^{2+}}$, $\ce{Ti^{4+}}$]

Statement II : $\ce{Th^{4+}}$ is the strongest reducing agent among $\ce{Th^{4+}}$, $\ce{Ce^{4+}}$, $\ce{Gd^{3+}}$ and $\ce{Eu^{2+}}$.

In the light of the above statements, choose the correct answer from the options given below