Two identical conducting wires AOB and COD are placed at right angles to each other. The wire AOB carries an electric current $$I_1$$ and COD carries a current $$I_2$$. The magnetic field on a point lying at a distance '$$d$$' from O, in a direction perpendicular to the plane of the wires AOB and COD, will be given by

A

$$\frac{\mu_0}{2\pi} \left(\frac{I_1 + I_2}{d}\right)^{1/2}$$

B

$$\frac{\mu_0}{2\pi d} (I_1^2 + I_2^2)^{1/2}$$

C

$$\frac{\mu_0}{2\pi d} (I_1 + I_2)$$

D

$$\frac{\mu_0}{2\pi d} (I_1^2 + I_2^2)$$