The magnetic induction and the intensity of magnetic field inside an iron core of an electromagnet are 1 Wbm^–2 and 150 Am^–1 respectively. The relative permeability of iron is :

$\left({\mathrm{\mu }}_0=4\mathrm{\pi } \mathrm{x} {10}^{-7} \mathrm{Henry}/\mathrm{m}\right)$

• A

  $\frac{{10}^6}{4\mathrm{\pi }}$

• B

  $\frac{{10}^6}{6\mathrm{\pi }}$

• C

  $\frac{{10}^5}{4\mathrm{\pi }}$

• D

  $\frac{{10}^5}{6\mathrm{\pi }}$