The moment of inertia of a circular ring of mass $M$ and diameter $r$ about a tangential axis lying in the plane of the ring is

  • A
    $\frac{1}{2} Mr^2$
  • B
    $\frac{3}{8} Mr^2$
  • C
    $\frac{3}{2} Mr^2$
  • D
    $2 Mr^2$

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