The correct order of ionic radii of $Ce, La, Pm$ and $Yb$ in $+3$ oxidation state is
- A$La^{+3} < Pm^{+3} < Ce^{+3} < Yb^{+3}$
- B$La^{+3} < Ce^{+3} < Pm^{+3} < Yb^{+3}$
- C$Yb^{+3} < Ce^{+3} < Pm^{+3} < La^{+3}$
- D$Yb^{+3} < Pm^{+3} < Ce^{+3} < La^{+3}$
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