The compressibility factor of gas is less than unity at STP, therefore

• A

  ${\mathrm{V}}_{\mathrm{m}}\text{ (molar volume) }>22.4\mathrm{L}$

• B

  $V_m<22.4\mathrm{L}$

• C

  ${\mathrm{V}}_{\mathrm{m}}=22.4\mathrm{L}$

• D

  ${\mathrm{V}}_{\mathrm{m}}=44.8\mathrm{L}$