Two concentric coils each of radius equal to 2π cm are placed at right angle to each other. 3 A and 4 A are the currents flowing in each coil respectively. The magnetic induction (in Wb m-2 ) at the centre of the coils (µ0 = 4π×10-7 Wb A-1 m-1 ) will be
(a) 12 × 10-5
(b) 10-5
(c) 5 × 10-5
(d) 7× 10-5
