A block $A$ of mass $100 \mathrm{kg}$ rests on another block $B$ of mass $200 \mathrm{kg}$ and is tied to a wall as shown in the figure. The coefficient of friction between $A$ and $B$ is $0.2$ and that between $B$ and ground is $0.3$. The minimum force required to move the block $B$ is $\left(g=10 \mathrm{m} {\mathrm{s}}^{-2}\right)$

• A

  $900 \mathrm{N}$
• B

  $200 \mathrm{N}$
• Correct answer
  C

  $1100 \mathrm{N}$
• D

  $700 \mathrm{N}$

Hence, the correct answer is option: 'C'.