Two long parallel wires carry currents of equal magnitude (I) but in opposite directions. These wires are suspended from fixed rod PQ by four chords of equal length L as shown. The mass per unit length of each wire is $$\lambda$$, the value of angle $$\theta$$ subtended by two chords OA and OB, assuming it to be small, is

A

$$\theta = I\sqrt{\frac{\mu_0}{4\pi}\frac{\lambda}{gL}}$$

B

$$\theta = I\sqrt{\frac{\mu_0}{\pi}\frac{1}{\lambda g L}}$$

C

$$\theta = I\sqrt{\frac{\mu_0}{4\pi}\frac{g}{\lambda L}}$$

D

$$\theta = I\sqrt{\frac{\mu_0}{\pi}\frac{\lambda g}{L}}$$