Due to the presence of the current $$I_1$$ at the origin

A

The forces on $$AB$$ and $$DC$$ are zero

B

The forces on $$AD$$ and $$BC$$ are zero

C

The magnitude of the net force on the loop is given by $$\frac{\mu_0 I_1}{4\pi}\left[2(b-a) + \frac{\pi}{3}(a+b)\right]$$

D

The magnitude of the net force on the loop is given by $$\frac{\mu_0 I I_1}{24ab}(b - a)$$