A square frame, made of copper wire is carrying a current $\mathrm{i}=12 \mathrm{A}$. Length of side of the square is 1 m. If the frame is placed in a magnetic region where ${\mathrm{B}}_1=1 \mathrm{\mu T}\text{ and }{\mathrm{B}}_2=2 \mathrm{\mu T},$ then net force experienced by the square frame is 

• A

  $12\times {10}^{-6} \mathrm{N}$

• B

  $36\times {10}^{-6} \mathrm{N}$

• C

  $24\times {10}^{-6} \mathrm{N}$

• D

  $18\times {10}^{-6} \mathrm{N}$