Which of the following have the same number o | vedclass

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(D) The electronic configurations are as follows:$Cr (Z=24): [Ar] 3d^5 4s^1$. It has $5$ unpaired electrons in the $d$ orbitals.$Mn (Z=25): [Ar] 3d^5

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$A$,$B$ and $C$

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(D) The electronic configurations are as follows:$Cr (Z=24): [Ar] 3d^5 4s^1$. It has $5$ unpaired electrons in the $d$ orbitals.$Mn (Z=25): [Ar] 3d^5 4s^2$. It has $5$ unpaired electrons in the $d$ orbitals.$Fe^{3+} (Z=26): [Ar] 3d^5 4s^0$. It has $5$ unpaired electrons in the $d$ orbitals.Therefore,all $A$,$B$,and $C$ have the same number of unpaired electrons in $d$ orbitals.

Column-$I$	Column-$II$
$(1)$ General electronic configuration of $d$-block elements	$(A)$ Transition elements
$(2)$ $d$-block elements	$(B)$ $(n-1)d^{1-10}ns^{1-2}$
$(3)$ Groups $3$ to $12$	$(C)$ $Z = 58$ to $71$
$(4)$ Lanthanoid elements	$(D)$ Last electron enters $d$-orbital

Which of the following have the same number of unpaired electrons in $d$ orbitals?

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