In an $n$-type semiconductor:

  • A
    Pentavalent impurities are dopants and holes are majority carriers.
  • B
    Trivalent impurities are dopants and electrons are minority carriers.
  • C
    Pentavalent impurities are dopants and electrons are majority carriers.
  • D
    Trivalent impurities are dopants and holes are majority carriers.

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