Identify the correct statement from the following:

  • A
    Lanthanoids have a greater tendency to form complexes than actinoids.
  • B
    Actinoid contraction is greater than lanthanoid contraction.
  • C
    Hydroxides of actinoids are less basic than lanthanoid hydroxides.
  • D
    Binding energy of $4f$-orbitals is lower than $5f$-orbitals.

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