The general electronic configuration of the transition element is:

The general electronic configuration of the transition element is $(n-1)d^{1-10}n{s}^{1-2}$.

D-block elements are sometimes referred to as transition elements since they have an inner partially filled d-subshell. As a result, their overall electrical arrangement is $(\mathrm{n}-1){\mathrm{d}}^{1-10},{\mathrm{ns}}^{1-2}$

Hence, option C is correct.