An electron revolving in an orbit of radius 0.5 $\text{Å}$ in a hydrogen atom executes 10¹⁶ revolutions per second. The magnetic moment of electron due to its orbital motion will be

• A

  $1.256\times {10}^{-23}{\mathrm{Am}}^2$

• B

  $653\times {10}^{-26}{\mathrm{Am}}^2$

• C

  ${10}^{-3}{\mathrm{Am}}^2$

• D

  $256\times {10}^{-26}{\mathrm{Am}}^2$