$A$ metal has $bcc$ structure and the edge length of its unit cell is $3.04 \, \mathring{A}$. The volume of the unit cell in $cm^3$ will be

• A
  $1.6 \times 10^{21} \, cm^3$
• B
  $2.81 \times 10^{-23} \, cm^3$
• C
  $6.02 \times 10^{-23} \, cm^3$
• D
  $6.6 \times 10^{-24} \, cm^3$