What is the general electronic configuration of the outermost shell of $f$-block elements?

  • A
    $(n - 2)f^{0-14}(n - 1)d^{0-1}ns^2$
  • B
    $(n - 2)f^{1-14}(n - 1)d^{0-1}ns^2$
  • C
    $(n - 1)f^{0-14}(n - 1)d^{1-2}ns^2$
  • D
    $(n - 1)f^{1-14}(n - 1)d^{0-1}ns^1$

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