The correct basicity order of the following lanthanide ions is

• A
  $La^{3+} > Lu^{3+} > Ce^{3+} > Eu^{3+}$
• B
  $Ce^{3+} > Lu^{3+} > La^{3+} > Eu^{3+}$
• C
  $Lu^{3+} > Ce^{3+} > Eu^{3+} > La^{3+}$
• D
  $La^{3+} > Ce^{3+} > Eu^{3+} > Lu^{3+}$