Two bodies of mass $4\mathrm{kg}$ and $6\mathrm{kg}$ are tied to the ends of a massless string. The string passes over a pulley which is frictionless (see figure). The acceleration of the system in terms of acceleration due to gravity $\left(g\right)$ is:

• A

  $\frac{g}{2}$
• Correct answer
  B

  $\frac{g}{5}$
• C

  $\frac{g}{10}$
• D

  $g$

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