What is the number of octahedral voids present in $0.2 \ mol$ of a compound forming $hcp$ structure?

  • A
    $1.204 \times 10^{23}$
  • B
    $2.387 \times 10^{23}$
  • C
    $3.011 \times 10^{23}$
  • D
    $3.321 \times 10^{23}$

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