Which of the following complex ions is expected to absorb visible light?

Visibility of colour depends on $d-d$ transitions, which require partially filled $d$ -orbitals.${\text{Ti}}^{4+}:d^0$ (No $d-d$ transition).${\text{Cr}}^{3+}:d^3$ (Unpaired electrons present, absorbs light).${\text{Zn}}^{2+}:d^{10}$ (Fully filled, no transition).${\text{Sc}}^{3+}:d^0$ (No $d-d$ transition).