The magnetic induction and the intensity of magnetic field inside an iron core of an electromagnet are `1 Wbm^(-2)` and `150Am^(-1)` respectively. The relative permeability of iron is : `(mu_(0)=4pixx10^(-7)"henry"//m)`
A. 25
B. `10^(5)/(3 pi)`
C. `10^(5)/pi`
D. `10^(5)/(5 pi)`