Correct option is C
· Watt per steradian (W/sr) is the SI unit of radiant intensity, which measures the power emitted by a source per unit solid angle in a specific direction.
· Radiant intensity is used in photometry and radiometry to describe the directional emission of light or other electromagnetic radiation.
· Permittivity: Measured in farads per meter (F/m).
· Permeability: Measured in henries per meter (H/m).
· Electric conductance: Measured in siemens (S).
