A solid sphere and a thin uniform circular disc of same radius are rolling down an inclined plane without slipping. If the acceleration of the sphere is $3 \mathrm{~ms}^{-2}$, then the acceleration of the disc is

• A

  $4 \mathrm{~ms}^{-2}$
• Correct answer
  B

  $2.8 \mathrm{~ms}^{-2}$
• C

  $3 \mathrm{~ms}^{-2}$
• D

  $3.2 \mathrm{~ms}^{-2}$

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