A thin uniform wire of mass m and length l is bent into to shape of a semicircle. The moment of inertia of that wire about an axis passing through its free ends is

Options

A. `frac{ml^2}{pi^2}`
B. `frac{ml^2}{2pi^2}`
C. `frac{ml^2}{3pi^2}`
D. `frac{ml^2}{4pi^2}`