What is the correct order of ionic radii for the $+3$ oxidation state in $Ce, La, Pm,$ and $Yb$?

• 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
  $Yb^{3+} < Pm^{3+} < Ce^{3+} < La^{3+}$