Two concentric coils, each of radius equal to 2$\pi$ cm, are placed at right angles to each other. Currents of 3A and 4 A, respectively, are flowing through the two coils. The magnetic induction, in Wb $m^{-2}$, at the center of the coils will be  

[${\mu }_0$ = 4$\pi$ × 10-7 Wb(A$m^{-1}$)]

• A

  $5\times {10}^{-5}$

• B

  $\text{7 }\times {10}^{-5}$

• C

  $\text{12 }\times {10}^{-5}$

• D

  ${10}^{-5}$