In the sixth period,the orbitals that are filled are

  • A
    $6s, 5f, 6d, 6p$
  • B
    $6s, 6p, 6d, 6f$
  • C
    $6s, 5d, 5f, 6p$
  • D
    $6s, 4f, 5d, 6p$

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