Two blocks A and B of masses 2 kg and 4 kg respectively are kept on a rough horizontal surface. If same force of 20 N is applied on each block, then the ratio of the accelerations of the blocks $A$ and $B$ is (Coefficient of kinetic friction between the surface and the blocks is 0.3 and acceleration due to gravity $=10 \mathrm{~m} \mathrm{~s}^{-2}$ )

• A

  $1: 1$
• Correct answer
  B

  $7: 2$
• C

  $1: 2$
• D

  $4: 3$

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