Two straight long conductors `AOB` and `COD` are perpendicular to each other and carry currents `I_(1)` and `I_(2)`. The magnitude of the magnetic induction at a point `P` at a distance `d` from the point `o` in a direction perpendicular to the plane `ABCD` is :
A. `(mu_(0)//2pia)(i_(1)+i_(2))`
B. `(mu_(0)//2pia)(i_(1)-i_(2))`
C. `(mu_(0)//2pia)(i_(1)^(2)-i_(2)^(2))^(1//2)`
D. `(mu_(0)//2pia)[i_(1)i_(2)//(i_(1)+i_(2))]`
