A thin flexible wire of length L is connected to two adjacent fixed points and carries a current I in the clockwise direction, as shown in the figure. When the system is put in a uniform magnetic field of strength B going into the plane of the paper, the wire takes the shape of a circle. The tension in the wire is

A

$$IBL$$

B

$$\frac{IBL}{\pi}$$

C

$$\frac{IBL}{2 \pi}$$

D

$$\frac{IBL}{4 \pi}$$