Three point masses are arranged as shown in the figure. Moment of inertia of the system about the axis `O O'` is `: (` passing through its plane `)`

Options

A. `2ma^(2)`
B. `(ma^(2))/2`
C. `ma^(2)`
D. none of these

Answer

B

Explanation

`I_(0,0)=m(O)^(2)+m(a/2)^(2)+m(a/2)^(2)=(ma^(2))/2`