Silver atom has completely filled $d$ orbitals $\left(4d^{10}\right)$ in its ground state. How can you say that it is a transition element?

(N/A) The ground state electronic configuration of $Ag$ is $\left[Kr\right] 4d^{10} 5s^{1}$.
Although the $d$-orbital is completely filled in the ground state,a transition element is defined as an element which has an incompletely filled $d$-orbital in its ground state or in any of its common oxidation states.
Silver exhibits $+1$ and $+2$ oxidation states.
In the $+2$ oxidation state,the electronic configuration becomes $\left[Kr\right] 4d^{9}$.
Since the $d$-orbital is incompletely filled in the $+2$ oxidation state,silver is considered a transition element.