In the following figure, the pulley is massless and frictionless. There is no friction between the body and the floor. The acceleration produced in the body when it is displaced through a certain distance with force ‘P’ will be

• A

  $\frac{\mathrm{P}}{\mathrm{M}}$

• B

  $\frac{\mathrm{P}}{2\mathrm{M}}$

• C

  $\frac{\mathrm{P}}{3\mathrm{M}}$

• D

  $\frac{\mathrm{P}}{4\mathrm{M}}$