What is moment of inertia of a cylinder of radius $r$, along its height ?

• A

  $m r^2$
• Correct answer
  B

  $\frac{m r^2}{2}$
• C

  $\frac{2 m r^2}{5}$
• D

  $\frac{m r^2}{5}$

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