Explanation:

Let’s break it down:

- Coulomb per second is the unit we use to measure how much electric charge flows in one second.

- What this really means is, it's describing electric current.

- The official name for this unit in the SI system is Ampere (A). 

- Here’s how the options line up:

- Option 1: Capacitance — This measures how much charge a capacitor can store per volt (unit is Farad, not Coulomb/second).

- Option 2: Resistance — This tells you how much a material resists current (unit is Ohm).

- Option 3: Electric current — This one is correct! That’s exactly what Coulomb/second means.

- Option 4: Magnetism — Magnetism has its own set of units, like Tesla or Weber, nothing to do with Coulomb/second.