The Brewsters angle ${\mathrm{i}}_{\mathrm{b}}$  for an interface should be

• A

  ${30}^0<{\mathrm{i}}_{\mathrm{b}}<{45}^0$

• B

  ${45}^0<{\mathrm{i}}_{\mathrm{b}}<{90}^0$

• C

  ${\mathrm{i}}_{\mathrm{b}}={90}^0$

• D

  $0^0<{\mathrm{i}}_{\mathrm{b}}<{30}^0$