Two similar coils of radius R are lying concentrically with their planes at right angles to each other.The currents flowing in them are I and 2I, respectively. The resultant magnetic field induction at the centre will be

Question

( A ) $\frac{\mu_0I}{R}$
( B ) $\frac{\mu_0I}{2R}$
( C ) $\frac{\sqrt{5}\mu_0I}{2R}$
( D ) $\frac{3\mu_0I}{2R}$