What is the density of water vapour at the boiling point of water?

  • A
    $1 \times 10^{-4} \ g \ cm^{-3}$
  • B
    $1 \ g \ cm^{-3}$
  • C
    $6 \times 10^{-4} \ g \ cm^{-3}$
  • D
    $4 \times 10^{-4} \ g \ cm^{-3}$

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