Pair of ions which are having only one unpair electronA. `Ce^(3+), Yb^(3+)`B. `Eu^(3+), Tb^(3+)`C. `Pm^(3+), Sm^(3+)`D. `Dy^(3+), Tb^(3+)`

Pair of ions which are having only one unpair electronA. `Ce^(3+), Yb^

1.	Pair of ions which are having only one unpair electronA. `Ce^(3+), Yb^(3+)`B. `Eu^(3+), Tb^(3+)`C. `Pm^(3+), Sm^(3+)`D. `Dy^(3+), Tb^(3+)`
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Pair of ions which are having only one unpair electronA. `Ce^(3+), Yb^(3+)`B. `Eu^(3+), Tb^(3+)`C. `Pm^(3+), Sm^(3+)`D. `Dy^(3+), Tb^(3+)`

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