Which electronic distribution in d-subshell is not observed in any neutral element of 3d series?

1n 3d series $3d^9$ configuration and $3d^4$configuration of neutral atom doesn't exist because in

case of $\text{ Cr. }$

${ }_{24}\mathrm{Cr}=4s^{2}3d^4$ (expected)

but ${ }_{24}\mathrm{Cr}=4s^{1}3d^5$ (correct)

and ${ }_{29}\mathrm{Cu}=4s^{2}3d^9$ (expected)

but ${ }_{29}\mathrm{Cu}=4s^{1}3d^{10}$ (correct) 

Hence, the option D is correct.