Which element from the following exhibits the | vedclass

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(D) The number of oxidation states exhibited by transition elements depends on the number of unpaired electrons in their $d$-orbitals.$Sc$ $([Ar] 3d^1

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$Zn$

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(D) The number of oxidation states exhibited by transition elements depends on the number of unpaired electrons in their $d$-orbitals.$Sc$ $([Ar] 3d^1 4s^2)$ shows $+2, +3$ oxidation states.$Ti$ $([Ar] 3d^2 4s^2)$ shows $+2, +3, +4$ oxidation states.$Cu$ $([Ar] 3d^{10} 4s^1)$ shows $+1, +2$ oxidation states.$Zn$ $([Ar] 3d^{10} 4s^2)$ has a completely filled $d$-subshell and shows only $+2$ oxidation state.Therefore,$Zn$ exhibits the lowest number of different oxidation states.

Which element from the following exhibits the lowest number of different oxidation states?

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