A solenoid has a core of material with relative permeability $501.$ The windings of the solenoid are insulated from the core and carry a current of $2.5 \mathrm{A}.$ If the number of turns are $900$ per metre. The magnetization in $\mathrm{A} {\mathrm{m}}^{-1}$ is

• Correct answer
  A

  $1.125\times {10}^6$
• B

  $2.8\times {10}^6$
• C

  $2.25\times {10}^6$
• D

  $1.69\times {10}^6$

Hence, the correct answer is option: 'A'.