In $\mathrm{S}\mathrm{I}$ units, the dimensions of $\sqrt{\frac{{\mathrm{ϵ}}_0}{{\mathrm{\mu }}_0}}$ is:

• A

  $\mathrm{A}{\mathrm{T}}^2{\mathrm{M}}^{-1}{\mathrm{L}}^{-1}$
• Correct answer
  B

  ${\mathrm{ }\mathrm{A}}^2{\mathrm{T}}^3{\mathrm{M}}^{-1}{\mathrm{L}}^{-2}$
• C

  ${\mathrm{A}}^{-1}\mathrm{T}\mathrm{M}{\mathrm{L}}^3$
• D

  $\mathrm{A}{\mathrm{T}}^{-3}\mathrm{M}{\mathrm{L}}^{3/2}$

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