The relative permeability in a core of a solenoid is 400. The windings of a solenoid are insulated from the core and carry a current of 2A. If the number of turns is 1000 per meter. Then magnetic Intensity inside the core of solenoid is ______ `A//m`.

Options

A. `2.5xx10^3`
B. `2xx10^3`
C. `2.5xx10^(-3)`
D. `2xx10^(-3)`