Step 1: Recall the base units:
The seven SI base units are metre, kilogram, second, ampere, kelvin, mole and candela. Anything not in this list is a derived unit or belongs to another system.
Step 2: Link quantity to unit:
Light-related measurement, meaning how much visible light a source sends out per unit solid angle in one direction, is called luminous intensity. Its base unit is the candela (cd).
Step 3: Test each option:
Ampere measures flow of charge, so it is current. Coulomb measures charge itself. Ohm measures resistance to current. Only the candela belongs to light.
Final Answer:
Luminous intensity is measured in candela, option (C).
\[ \boxed{\text{Candela (C)}} \]