The SI unit of ___ is named after Andre Marie Ampere.

The correct answer is C. electric current.

The SI unit of electric current is the ampere (A), which is named after André-Marie Ampère. The ampere is defined as the constant current that, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed one metre apart in a vacuum, would produce between these conductors a force equal to 2 × 10−7 newton per metre of length.

Power is the rate at which energy is transferred or converted. The SI unit of power is the watt (W), which is equal to one joule per second.

Potential difference is the difference in electric potential between two points. The SI unit of potential difference is the volt (V), which is equal to one joule per coulomb.

Energy is the ability to do work. The SI unit of energy is the joule (J), which is equal to the work done by a force of one newton acting over a distance of one metre.