A uniform disc of radius ‘R” and mass ‘M’ can rotate without friction on an axis passing through its centre and perpendicular to its plane. A cord is wound at the rim of the disc and a uniform force of F is applied on the cord. The tangential acceleration of a point on the rim of the disc is

• A

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

• B

  $\frac{\mathrm{F}}{\mathrm{M}}$

• C

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

• D

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