Explanation:

- The SI unit of electric current is the Ampere.

- Option 1: Watt – This is the unit of power, not electric current. It measures how fast energy is used or transferred.

- Option 2: Volt – This is the unit for electric potential or voltage, not current. It measures the difference in electric potential energy.

- Option 3: Ampere – This is the correct answer! The Ampere (A) measures the flow of electric charge per second.

- Option 4: Coulomb – This is the unit for electric charge, not current.